How to clean injectors without removing them from the engine

Tools and materials for cleaning injectors

The operation of cleaning the injector without special equipment (ultrasonic baths and fuel stands) will go quickly and efficiently if you have a few necessary tools and a simple homemade device on hand. The device is a simulator of the operation of an injector in combat conditions, that is, the injector removed from the engine will be visually diagnosed, washed and fully prepared for further use. For washing it is useful:

1. Five cc disposable syringe.
2. Aerosol for carburetor cleaning from any manufacturer.
3. Two meter wires of any section.
4. 12 volt lamp.
5. Single position switch or push button.

How to clean the injectors of a VAZ 2107

Methods for cleaning sprayers may vary; the use of one method or another depends on the level of contamination of the holes and the nature of the deposits. If you carry out preventive cleaning or remove light contamination, you can use special chemicals, the use of which does not involve removing the injectors.

If the injectors are in a neglected state and cleaning with additives does not make sense, then you will have to dismantle the injector and replace the VAZ 2107 injectors.

Cleaning injectors with additives

Additives can not only remove deposits from fuel nozzles, but also clean the fuel system as a whole. This method is effective only with the systematic use of cleaning chemicals. Additives need to be used every 17-20 thousand kilometers. To clean, the standard fuel pump is turned off, and the fuel injection line is connected to a container through which the cleaning liquid is supplied under pressure. The engine is started and idles for a quarter of an hour, after which it is turned off for the same amount of time. During this time, the deposits become soft. The engine is then started again, but this time the speed is gradually increased to maximum to remove sludge fragments. In this mode, the internal combustion engine should operate for about half an hour.

Manual cleaning

For manual cleaning you will need:

• A jar of injector cleaner;
• A set of spanners or open-end wrenches;
• Screwdriver Set;
• Syringe 5-7 ml;
• Clean rags.

Follow the following sequence of actions for the success of the event:

1. We dismantle the air pipe fixing clamps using the key set to “7” and remove the pipe;
2. We dismantle the throttle cable clamp with a “flat” screwdriver;
3. Remove the accelerator cable and its bracket;
4. We dismantle the fuel lines and pipe fastenings;
5. Dismantle the VUT hose;
6. We dismantle the fuel pipe brackets and the intake manifold;
7. Remove the fuel rail mounting bolts;
8. Loosen the injector mounting harness;
9. We remove the injectors with the fuel rail.

We clean the sprayers in accordance with the instructions given on the packaging of the chemical. We perform assembly in reverse order.

Malfunctions caused by clogging of the structure

Fuel injectors for the VAZ 2114 have rather low performance. In combination with the poor quality of gasoline at domestic gas stations, problems often arise with the VAZ engine caused by clogging of the element and their nozzles. For stable and balanced operation of the engine, it is recommended to monitor the condition of the injectors.

When the accelerator is applied sharply, dips occur, the car drives poorly on a not warmed-up engine, jerks or slows down - poor-quality system operation.

Based on the following indirect signs, we can safely say that the injectors require cleaning, and in some cases, replacement:

1. stopping the engine at idle;
2. increased gasoline consumption;
3. the motor does not produce rated power;
4. low engine response;
5. unstable operation of the power unit;
6. failures when moving.

Cleaning the VAZ system at a service station

You can clean the injectors using ultrasound by taking your VAZ to a service center. A qualified specialist using good equipment will perform this procedure, which will have a positive effect on the dispersion of the spray and increase the productivity of the structure. Cleaning at the station helps restore spray quality, which will increase engine efficiency, throttle response and power. The list of work performed at a service station may include measuring CO, adjusting idle speed, removing the rack with injectors, and measuring productivity. Next, the main procedure is ultrasonic cleaning, as well as replacing the fuel filter and system seals.

Injectors for VAZ 2114

Removing an element

But all this pleasure costs money, and high-quality work at a good service station costs a lot. Therefore, there is an alternative - cleaning the system with your own hands

First, let's pay attention to the features of dismantling injectors

• First, remove the fuel rail.
• Unfasten the wiring block (by pressing on the bracket).
• Using a screwdriver, disconnect the injector retainer.
• Extracting the elements.
• We remove the O-rings, since they are squeezed out and new ones must be installed during reassembly.

During dismantling and reassembly, no damage to the nozzles or entry into the system is allowed. In order to install new injectors on the ramp, you need to do everything the same, but only in reverse order.

Do-it-yourself system cleaning

Cleaning the structure without your car visiting a VAZ service center can be done in two ways.

In the first case, you must first buy an injector and carburetor cleaner and o-rings for the system.

After removing the injectors from their regular places, we lower them into a suitable container with injector cleaner. We separately clean the IAC using a carburetor spray. A layer of resin is formed around the nozzle on the structure, which must be carefully cleaned by periodically washing it with a spray.

We carry out internal cleaning using a pump and a power source with a voltage of 3 to 12 volts. We pour cleaner into the pump hose and pump the nozzle under a pressure of 6 atmospheres, simultaneously applying voltage. The voltage can be raised to 9-12 volts until a characteristic crackling sound appears.

Next, in reverse order, we put everything back in place, connect the block and we can start the VAZ engine.

The second method is more economical, but more troublesome. We only purchase liquid for cleaning carburetors. Pour the spray into the pump hose and connect the latter to the system.

A high-quality carburetor spray can provide excellent external reading of the injector, but it will take longer to tinker and soften the coking. Next, we apply voltage to the injector in jerks until it crackles and perform internal cleaning. When installing the injectors in their original place, it is advisable to carefully lubricate the new seals with soapy water, which will increase the tightness.

Periodic maintenance and cleaning of fuel injectors will ensure stable engine operation and economical operation of a VAZ vehicle.

Ultrasound or chemicals for cleaning the injector?

So, it was decided that the injectors and injector needed to be cleaned. Which method should I choose? Common methods are washing the injector without removing the injectors or cleaning the injector on an ultrasonic bench. The cleaning efficiency of the second method is several orders of magnitude higher, but in this case, except for the nozzles, nothing else is cleaned. For VAZ cars, sometimes cleaning is not the right solution. It is much easier and cheaper to simply replace the injectors.

Today, simple single-circuit installations are used for washing and cleaning. These are containers in which the solvent is located. The unit is placed next to the machine. A hose is connected to the inlet of the fuel rail to inject the product into the system. The cleaner, which acts as both a cleaning agent and a fuel, is supplied to the system by a compressor.

But there is a drawback: this method does not allow the cleaning fluid to pass through the pressure regulator and shut-off valve. This is ineffective and does not flush out the fuel system. Double-circuit stands are much more efficient, since the cleaning liquid passes through all fuel systems. As for ultrasound, it began to be used back in 1985. A bath for such cleaning is a container with a cleaner. An ultrasonic emitter is installed at the bottom of this bath.

The disadvantage is that you only need to clean the injector nozzle. And modern sprayers cannot be cleaned using ultrasound. And this process is quite labor-intensive.

It is preferable to use imported solvents as a cleaner for injectors and injectors. They are of high quality. These are, for example, injector cleaning products such as the German Liqui Moly, the Belgian Winns or the American Hi-Gear. Domestic products were also tested, but neither “Toilet duckling” nor “Moidodyr” were suitable for these purposes.

How to clean injectors yourself

Method 1: fuel additive

The simplest and relatively gentle cleaning method is using special additives. More suitable for preventing the formation of deposits inside all elements of the fuel system - from the gas tank to the injectors.

The disadvantage of such additives is that on cars with high mileage they lift all the dirt from the gas tank and pipelines. As a result, the filters and the injectors themselves become clogged, which leads to even more disastrous consequences.

You will need

• Fuel additive-injector cleaner.

How to do

1. Pour the product into the tank immediately before refueling according to the proportions in the attached instructions.
2. Operate the vehicle as normal.
3. For the best cleaning effect, it is advisable not to stand in city traffic jams, but to drive along the highway.

Method 2: flushing the injectors on the engine

This cleaning method is more difficult, but also more effective. It not only cleans the injectors, but also additionally decarbonizes the piston rings and also increases compression. Flushing is carried out with the engine running, which runs on detergent instead of gasoline.

The main disadvantage is that the quality of washing cannot be controlled. Other disadvantages include the entry of aggressive substances into the exhaust tract and potential damage to the catalyst. After using some products, spark plugs may need to be replaced.

You will need

• Injector cleaner;
• fuel filter;
• two-liter plastic bottle;
• wire;
• 1 m of fuel hose with a diameter of 10–12 mm;
• 3 clamps with a diameter of 9–14 mm;
• 2 nipples from a tubeless tire;
• bolt M12;
• screwdriver or drill;
• drill with a diameter of 12½ mm;
• tire compressor;
• spark plugs (if their replacement is recommended in the flushing instructions).

How to do

1. Drill one hole each in the cap and bottom of the bottle. Install the nipple with the valve turned out into the cover. The nipple will supply liquid to the ramp.
2. Insert the second nipple assembly into the hole in the bottom. You will need it to pump in air later to create pressure.
3. Place one end of the hose onto the nipple in the cover, and install the other on the fuel filter, according to the arrow on the body. Tighten the ends of the hose with clamps. Wrap the bottle with wire so you can hang it.
4. Warm up the engine to operating temperature and turn it off. Disable the fuel pump by removing the corresponding fuse.
5. Start the engine. Let it run to relieve pressure in the rail. Wait until the engine stops.
6. Disconnect the fuel supply hose from the line and connect it to the filter of an improvised flushing receiver. Pour the wash into the bottle, close the cap and hang it on the hood.
7. If the car has a return fuel line, plug it using a bolt of suitable diameter and clamp it with a clamp.
8. Use a compressor to pump air into the bottle until the pressure reaches 2–2½ bar.
9. Start the engine and let it idle for 15 minutes, maintaining the pressure in the bottle at the same level.
10. Turn off the engine and wait about 15 minutes for all deposits to soak off.
11. Start the engine again and use up any remaining flushing fluid while maintaining the RPM between 1,000 and 1,500.
12. Remove the bottle, the return plug and connect everything as normal. Don't forget the fuse.
13. If the flush is aggressive and affects the spark plugs, replace them.

Method 3: washing and removing the injectors

The most difficult method, which involves removing the fuel rail and injectors. At the same time, it is the most effective and targeted - there is no harm to other elements of the system. For flushing, the operation of an injector is simulated, and a carburetor cleaner is used instead of gasoline.

The only disadvantages of this method are the difficulty of dismantling the ramp and injectors, as well as the need to replace microfilters and o-rings.

You will need

• Aerosol cleaner for carburetors;
• syringe 5 mm³;
• 9-volt Krona battery;
• 1–2 m of wires;
• doorbell button or other without fixation;
• 4 alligator clips;
• screw with a diameter of 4 mm;
• pliers;
• repair kit for injectors (only rubber rings and a filter are allowed).

How to do

1. Remove the throttle assembly and fuel rail. Disconnect the injector wires and remove them.
2. Pour some cleaning liquid directly into the bottle cap and place the nozzles there for 15-20 minutes to dissolve the carbon deposits. You can use the same cleaner to wash the throttle assembly while it is removed.
3. Connect the battery contacts and the injector with wires and clamps, observing the polarity. Cut one of the wires and install a bell button in the gap.
4. Make an adapter from the body of the syringe by placing the thin end on the aerosol tube.
5. Remove the microfilter from the first injector: screw a screw into the fuel channel and pull it out with pliers.
6. Place the syringe on the nozzle side of the sprayer. Press down on the valve of the cleaner bottle and at the same time press the bell button several times.
7. Place the syringe on the nozzle from the reverse side. Press the valve and press the bell button intermittently until the liquid begins to spray out in an even pattern.
8. Repeat steps 5–7 for each injector.
9. Replace filters and rubber seals by lightly tapping them.
10. Reinstall the injectors and ramp, reassemble all parts in reverse order.

Source: lifehacker.ru

Replacement or flushing?

Some problems can be eliminated by cleaning and flushing. Others are “treated” only by replacement.

Table: problems with injectors

In these cases, flushing is not a panacea. This method should be used taking into account the mileage and quality of service during operation.

During operation, the injector nozzles inevitably become coked and clogged with resinous deposits. The picture is aggravated by low-quality fuel, which can introduce additional pollutants.

For some time, fuel atomizers continue to operate without any visible changes, but sooner or later contaminants accumulate, changing the shape of the spray and reducing performance.

Injector life expectancy is limited even when using the cleanest fuel. Manufacturers recommend changing them every 100–120 thousand kilometers. Due to the fact that motorists use imperfect gasoline, and the one that can be bought at gas stations, the part has to be changed after 80-100 thousand km.

There is an opinion among motorists that “there is no need to interfere if everything works fine.” This opinion is justified, but only if the owner is ready to replace the nozzles with new ones approximately every 50 thousand kilometers.

The fact is that by getting rid of minor deposits as they accumulate, the owner extends the life of the consumable, since pollutants do not have time to cause irreparable damage.

Clogged injectors begin to interfere with normal operation after 30–50 thousand km.

Initially, negative processes manifest themselves only in increased fuel consumption. Owners do not always associate the increased “appetite” of the engine with injectors, since there are many reasons for this phenomenon.

In the range of 50–80 thousand km, pollution, having accumulated, can cause interruptions in engine operation, which is no longer undetectable. It becomes clear that “you have to get into the injectors,” but cleaning them at this stage may be useless. When a clogged part is used for a long time, the diameter of the nozzle often increases. Flushing will remove contaminants, but the original parameters will not be restored.

To extend the life of trouble-free operation and postpone replacement, you should regularly check the

pour injector cleaning fluid into the tank or use it in another way recommended by the manufacturer.

Motorists' opinions about the effectiveness and safety of injection chemicals are contradictory. Many people fear that flushing without removing it from the engine will clog the cylinders.

Indeed, if the car owner has not touched the injectors for a long time, it is impossible to do without removing the rack. The chemicals in the tank can cause harm instead of benefit. If you use cleaners regularly, without waiting for characteristic malfunctions to appear, there will be no harm to the engine from the chemicals.

Although injection chemistry has a beneficial effect on slightly dirty injectors, its use does not guarantee that the atomizers will comfortably “live” the entire period “allotted” to them by the manufacturer. You can unsuccessfully fill the tank with “left” gasoline at almost any gas station.

To minimize the accumulation of deposits, manufacturers recommend additional preventive flushing with special products every 30 thousand kilometers.

Replacing O-rings

To prevent fuel leakage, do not reuse the O-rings of the injector and injector body. They are replaced with new ones every time they are removed for any reason.

To remove the old ring, just pry it up with a screwdriver. When installing new ones, do not use hard tools; install the seals by hand. Before installing the injector, lubricate the rubber bands with engine oil.

An injection engine is not at all complicated, as owners of carburetor cars sometimes believe. Injectors are reliable parts that require only a little attention. Show it, and the engine will thank you.

Removing Kalina injectors

1. Slide the injector lock.
2. Remove the clamp.
3. Remove the injector from the fuel rail.
4. Remove the O-ring from the sprayer.

Before installing the injectors, it is necessary to replace the O-rings. Then apply a thin layer of engine oil to the O-rings. Assembling and installing the fuel rail with injectors is performed in the reverse order.

Source

Technical characteristics of the VAZ-21126-77 engine

Let us remind you that in another article we determine the best VAZ engine for a modern Lada car.

Keywords: Lada Granta engine | Lada Kalina engine

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Removing the fuel rail and injectors, checking VAZ-2107-20 injectors

The fuel rail of the VAZ-2104 engine serves to supply fuel to the injectors and is mounted on the intake pipe. On the top of the ramp, next to the injector of the 3rd cylinder, there is a fitting for monitoring the fuel pressure.

The pressure regulator, attached to the rail, changes the fuel pressure in the rail from 2.8 to 3.2 bar (280-320 kPa) depending on the vacuum in the receiver, maintaining a constant pressure difference between them. This is necessary for accurate dosing of fuel by injectors.

The injectors are electromagnetic valves that allow fuel to pass through when power is applied and are closed by the action of a return spring when power is de-energized. At the end of the injector there is a nozzle through which fuel is injected into the intake pipe. The injectors are sealed in the ramp and in the intake pipe with rubber rings; it is recommended to replace them each time the injector is dismantled. The controller controls the injectors. If there is a break or short circuit in the winding, the injector should be replaced. If the injectors become clogged, they can be washed at a special service station without dismantling them.

We carry out the work on a cold engine. Relieve pressure in the fuel system.

Unfasten or cut the plastic clamp securing the injector wire block to the front panel.

To replace the injector o-rings, use a screwdriver with a thin blade and remove the o-rings and nozzle.

We dismantle the other injectors in the same way.

To check the injectors, we connect the block of their wiring harness to the block of the wiring harness of the engine management system, and connect the fuel hoses to the tubes of the ramp and pressure regulator.

We install the electric fuel pump fuse in the relay and fuse block of the engine control system.

The shapes of the spray patterns, as well as the amount of fuel injected by each injector over a certain period of time, should not differ noticeably.

We check each injector separately by placing a transparent bulb under it and disconnecting the wire block from it. We supply 12V voltage from the battery with two wires to the injector and turn on the ignition.

After turning off the power from the injector, check whether fuel is leaking through the nozzle holes.

If the injector's electrical resistance is not correct, the performance and spray pattern are very different from other injectors, or if the injector is leaking, it will need to be replaced.

Install the ramp in reverse order. We replace damaged rubber O-rings with new ones and apply engine oil to them during installation. The tightening torque of the ramp mounting screws is 9–13 Nm, and the fuel pipe fittings are 20–34 Nm.

https://youtube.com/watch?v=WvQqW1Nnhbs

Sources

• https://mylada.net/remont/chistka-forsunok-vaz-2114-svoimi-rukami.html
• https://www.iva-soft.ru/base/VAZ/Articles/1/
• https://autoruk.ru/2101-2107-klass/vaz-2107-20/proveriaem-i-zameniaem-forsunki

How to economically wash injectors without going to a car service center

With the increase in the number of cars on the roads, the number of various services and workshops is growing. Despite fierce competition, the cost of their services does not fall. To save money, it is advisable for every vehicle owner to understand how it functions.

In this case, car owners “open their eyes” to how to properly maintain their “iron horse”. The electrical and fuel systems require special attention from the motorist.

READ How to remove the panel on Kalina

The quality of gasoline atomization directly determines the optimal proportions of the air-fuel mixture for easier ignition.

In the design of a modern car, fuel is crushed into small particles and mixed with air by injectors. Inside these devices there is a valve . It is held closed by a return spring.

Impulses from the electronic control unit open the valve , allowing the enriched fuel mixture to pass through.

Poor fuel quality and operational difficulties lead to the accumulation of carbon deposits on the internal surfaces of the injectors. Because of this, the channels become clogged.

Too much gasoline gets into the combustion chamber, which impairs ignition and combustion. Unburnt fuel residues enter the catalyst, which becomes clogged and melts. As a result, the engine begins to detonate, its power is noticeably reduced, and fuel consumption increases.

Most car manufacturers recommend cleaning injectors every 30,000 kilometers. Malfunctions in their functioning are shown by the on-board computer. In addition, you can carry out diagnostics of fuel equipment in specialized car services.

On the other hand, clogged injectors show the following signs:

• problems starting the engine;
• interruptions in engine operation at idle speed;
• decreased power, poor vehicle acceleration;
• increased fuel consumption;
• dips when pressing the accelerator pedal.

DO-It-Yourself: Do-it-yourself cleaning of injector nozzles

Washing LADA Granta injectors with removal

This method will not give us the opportunity to wash the intake valves, piston bottoms and rings from carbon deposits, but it will allow us to properly check the injectors and wash them very efficiently. At the same time, you don’t need to have any special skills or special equipment. The only thing that will cause some difficulties is dismantling the fuel rail.

Yes, and you can easily remove the ramp on Granta:

• We thoroughly blow and wash the engine.
• Relieve the pressure in the system as described above.
• Unscrew the first ramp mounting screw...
• ...and the second one.
• We disconnect the fuel line from the ramp with the same key number 17.
• We disconnect either the common cable of the injector wires, or each one individually.
• Remove the connectors from the injectors.
• Mark the location of the injectors on the ramp and remove the spring clips.
• Remove the injectors from the ramp.

To clean injectors in this way, you can use a simple aerosol can of cleaner (carburetor, throttle valves), solvent, or any other product.

If you remove the atomizer from the can, the nozzle fits perfectly onto the nozzle of the can. All that remains is to apply voltage to the injector solenoid valve so that it opens. Actually, you can simply connect two wires from the battery, as most people do.

Or you can assemble a simple device and, like a civilized person, wash the injectors efficiently and conveniently. As you can see in the photo, the device consists of a 9 V salt battery, a button with two contacts without locking and a standard connector for the nozzle. All this costs a penny, but will last for many years.

Now we simply press the nozzle while simultaneously closing the button contacts for a few seconds. Just protect your eyes from liquid. We wash the injectors and at the same time check their tightness. The nozzle, when closed, should under no circumstances allow liquid to pass through, but when open, should create an even and neat spray.

DO IT YOURSELF / Cleaning VAZ Kalina injectors in the garage with your own hands

After flushing, as a rule, fuel consumption is reduced by 5-7%, the intake manifold pressure drops by 3-5%, and problems with unstable engine operation and starting disappear. It was also noted that the operating frequency of the stepper motor of the idle speed controller is leveled, air consumption is reduced and mixture formation is improved.

How to clean gasoline injectors at home

To visualize the procedure for cleaning injectors, watch the video below.

Sources:

https://www.drive2.ru/l/8018712/ https://ak1310.ru/profilaktika/chistka-forsunok-svoimi-rukami-profilaktika-toplivnoj-forsunki-foto-vsyo-o-remonte-lada.html

Causes and symptoms of malfunctions of the seven injection nozzles

Injectors are one of the most important parts of the fuel injection system. If it fails, which happens extremely rarely, the operation of the engine is disrupted. Most often, fuel injectors become clogged, which occurs due to contact with aggressive media. An aggressive environment is not only the fuel, but also the burned fuel assemblies. Before cleaning the injectors on a VAZ 2107, you need to determine by the signs that diagnostics of these particular parts is required:

1. At idle, unstable operation of the internal combustion engine is observed.
2. When trying to move away, the engine stalls.
3. Reduced power and agility.
4. When moving, jerks and dips occur.
5. Excessive amount of exhaust gases from the muffler.
6. Increased fuel consumption.
7. Extraneous sounds and noise are observed when the engine is running.

If these signs are detected, you will need to check the condition of the injectors. The reason for their clogging is low-quality gasoline, which causes deposits to form on the walls. If your car has a faulty or missing fuel filter, then the need to clean the fuel nozzles arises quite often.

After removal, you will need to check the devices, or rather their condition. How to check the injectors on the seven, we will figure it out in the next section. If diagnostics show that they are unsuitable for use, they will need to be replaced.

Device diagnostics

To make sure that the injectors need to be cleaned or replaced, you will need to first perform some diagnostic procedures:

Cleaning VAZ injectors

You need to clean the injectors on VAZ cars (and on other brands of cars) approximately every 30-40 thousand kilometers, or even more often, it all depends on the operating conditions of the car and the quality of the fuel.
The injectors become clogged due to various debris present in the fuel. Therefore, after cleaning the injectors, it is advisable to change the fuel filter. How do you know if the injectors are clogged and it’s time to clean them? Everything is very simple - the engine begins to run unevenly (an experienced car owner will notice this immediately), increased fuel consumption, a decrease in power are possible, and the engine begins to tune up. But first, it’s better to diagnose the engine; perhaps the reason for the malfunction is hidden in something else.

If the reason was dirty injectors, then after cleaning you will immediately understand - the engine will run smoothly, without jumps and dips, the power will be the same. And the more clogged the injectors were, the more noticeable the difference will be.

Troubleshooting

Despite their undeniable advantages over carburetor systems, injection engines are quite capricious, subject to the influence of many factors and have higher maintenance requirements.

Engine performance depends on the condition of the injectors. The main external signs of problems with injectors are:

• jerks and dips when accelerating the car;
• reduced engine speed;
• unstable operation at idle and low speeds;
• high content of toxic substances in the exhaust.

Checking with a stethoscope

You can carry out diagnostics yourself or contact a car service. The procedure for checking injectors with your own hands is as follows.

1. Check the valve. If it does not move, then either the injector itself or the electrical circuit is faulty.
2. If a characteristic sound is heard when the valve opens, it is working properly. If there is no sound, the valve is not working.

When diagnosing injectors, you can use a stethoscope.

1. Using a stethoscope, listen to the injectors click when idling. Listen in such a way that the clicks are not transmitted along the fuel rail to the non-working injector from the working one.
2. Make sure that the frequency of clicking sounds increases as engine speed increases. Otherwise the injector is faulty.

Video: checking injectors with a stethoscope

Checking with a multimeter

A multimeter is a special device for diagnosing electrical circuits.

1. In the technical documentation, find the resistance value of the injectors installed on your car.
2. Disconnect the wires from the injectors.
3. Set the multimeter to resistance measurement mode.
4. Connect the multimeter contacts to the injectors.
5. Measure the injector resistance.

The normal impedance of injectors with low resistance should be 2–5 Ohms, with high ones – 12–17 Ohms. If the values ​​do not match, the injector is replaced with a new one.

Testing at the stand

The stand can have a different design, it can be expensive or cheap. Simple stands can be found in private garages. They are used to check the pressure of the injectors. Professional stands allow you to most accurately diagnose and adjust injectors. Such equipment is usually available only in service centers.

Professional injector testing stand

As a simple stand for checking injectors, you can use the MTA-2 mechanical tester. With its help, you can easily check the condition of the injectors, pressure, fuel injection pump. There is no need to disassemble the engine.

The Bosch stand is more expensive and complex. Many experts call it the standard of quality for diagnosing injection pump. The stands “Delphi”, “Hartridge”, “Rabotti” and others also show good results.

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There are two ways to clean nozzles

at
home
There are two ways to clean the nozzles at home

. This will be discussed in this article.

It often happens that on your next trip, when you press the accelerator pedal, you suddenly feel a breakdown or, for example, the car begins to “slip”, and in bad weather it moves very poorly. Well, all this points to the need for a quick cleaning of the injectors. How to clean injectors using viburnum? | Lada. Of course, there are many service stations these days, so you can go straight there. There, specialists will carry out ultrasonic cleaning.

Using an industrial method, you can restore 90% efficiency. Improves dispersion. This means that the fuel droplet size decreases as you cut. Productivity also increases, and fuel begins to be consumed evenly by the nozzles . And, importantly, the sprayer has been restored. This improves engine efficiency, the "response" is noticeable at low speeds, and this has a positive effect on the increase in power.

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maintenance stations, a list of services will be offered immediately. I want to know how to check the engine on the injector using. They are ready to measure CO and CH, check the engine at idle, and disassemble the fuel rail. The nozzles will be checked for tightness and performance twice (at the end of the work they will be checked) and will be cleaned with ultrasound. Specialists will also replace the fuel filter and rubber seals. nozzles

. Once the engine is installed, station personnel will adjust the CO and CH as well as the engine at idle.

But there is one problem, all the work of the maintenance

It costs money, and sometimes quite a lot.

Often, motorists love not only to drive their car, but also to “lift it themselves.” On the one hand, this is even a plus, because the costs will be much lower.

How to clean injectors at home

at your discretion?

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OWN JOB: Clean the injectors yourself

An effective way to clean the nozzle

The cleaning time for any type of equipment depends on the degree of contamination.

Dismantling of attachments on Kalin.

Take off nozzles

with viburnum. I'll notice nothing complicated. All gums remain intact after disassembly.

2 ways to clean injectors

• First, we need an injector cleaner like Vince; carburetor cleaner (homemade spray is a good option). How to remove vibration injectors (fuel). photo report on how to replace VAZ 1117, 1118 and 1119 injectors. It's also best to prepare one ring for the injector (in case you don't have to rush to the car market while working).

Cleaning procedure

• First of all, remove the barrel with two attachments - IAK.
• Next, remove the bar from the nozzle wires by first removing the clips from the bottom. Loosen the four screws on the nozzle rod and carefully pull out the nozzle rod. How to check injectors without removing the engine. Symptoms of a faulty injector. Checking the winding resistance level on the pipes. The work should be carried out with care so as not to damage it due to negligence. Each nozzle must be removed in turn.
• Now you need to take a container and fill it with Vins cleaner. how to clean injectors. Demonstration of a faulty air flow sensor on a viburnum, a priori. The container should be convenient for washing the nozzles in it. While they are “juicing”, you need to use a MAC cleaning spray.
• Typically nozzles are coated with coke around the nozzle
  .
  Externally, coke looks like resin. The area is very difficult to leave, but it is quite possible to clean it. After removing the coke, be careful around the nozzle to clean the surface of the funnel. How to check the power of injectors. This check is performed if the injectors themselves are working normally, but any injector does not work when the ignition is on. You will need to use a spray from time to time to blow out any excess. After the nozzle
  from the outside, it should be thoroughly washed from the inside.
• To rinse the nozzle
  inside you will need a 3-12V power source, a foot pump with a pressure gauge.
  Set of rubber nozzle rings on a button How to clean nozzles? The end of the hose is removed from the pump and the cleaner is filled there. The hose is then placed over the nozzle. After pumping about 6 atmospheres, a voltage of 3 V should be applied to the nozzle. Sometimes it happens that for the first time it is necessary to apply a voltage of 6-9 volts. This is because the nozzles
  cannot "click". Voltage must be supplied in “batches” during periodic pumping. Once each injector has been cleaned, they should be replaced in the reverse order.

How to clean injectors at home

The injector nozzle operates on the principle of a spray, dispensing the mixture into the working chamber of the engine. The duration of the injection cycle and the amount of fuel supplied are set in the program of the internal combustion engine control unit. For each of the injectors these parameters are the same. The fuel injector is located inside the intake manifold. The air flow passes through the manifold and carries the fuel particles ejected by the injector into the combustion chamber.

In order to wash the removed injectors, it is necessary to prepare a washing device. The injectors are flushed under pressure. To do this, we assemble the injector power supply circuit. The injector receives power from 9 to 12 V. The power source for opening the injector can be a crown battery or a car battery. We will use a rechargeable battery.

So, let's start assembling a device for washing injectors on a Lada car

For convenience, it is better to carry out the procedure together.

You need to prepare a syringe. Pull the piston out of it; the syringe cylinder should fit tightly onto the nozzle with the ring. You can also use a hose of a suitable diameter instead of a syringe and tighten it with a clamp. We will use a hose.

flushing with a syringe

flushing through a hose

Next, we twist the wires with the injector plug or with the “mother” terminals.

We connect the nozzle to the power source, observing the polarity. "+" and "-"

The injector should click, which means the injector is opening.

We hold the nozzle and spray carburetor cleaner into the hose and hold it, creating pressure in the hose between the nozzle and the cleaner bottle.

Then you need to open the injector by connecting the wires to the battery

The injector will spray carburetor cleaner and clear itself.

You can complete the procedure as soon as a uniform spray of fuel begins to emerge from the injector.

Next, you should do the same procedure with all the injectors.

Assembly should be carried out in the reverse order of disassembly.

Sources

• https://vse-dlyaavto.ru/kakie-luchshe-postavit-forsunki-na-vaz-2107/
• https://forexs-online.ru/remont/kak-snyat-forsunki-na-vaz-2107.html
• https://www.vazzz.ru/kak-samomu-pochistit-forsunku-inzhektor-vaz-2107/
• https://avtotop.info/kak-pomenjat-forsunki-na-vaz-2107-inzhektor/
• https://auto-park24.ru/remont/kak-snyat-forsunki-na-vaz-2107.html
• https://auto-park24.ru/obsluzhivanie/kak-pochistit-inzhektor-na-vaz-2107.html
• https://avtika.ru/kak-snyat-forsunki-dvigatelya-2107/
• https://enginehack.ru/promyvka-forsunok/

Method two: cleaning procedure

• This method is more advanced and also costs a little less. There is no need for injector cleaning fluid here. All you need is carburetor cleaning spray. Now you need to fill the pump hose with spray.
• Cleaning the outside should be done with a spray, which must first be applied to a clean cloth. It is with this cloth that you should wipe off carbon deposits
  from the injectors.
  How to remove injectors on a viburnum (fuel). Due to friction, the carbon deposits will gradually soften and wash off. How to produce on viburnum - pol-z.ru. This process can be accelerated using a screwdriver. Before putting the injectors in place, the O-rings must be lubricated with soapy water.

What are injectors?

An injector is a special mechanical sprayer located in the “head” of the engine, through which fuel is supplied to the cylinders under high pressure.

Injector malfunctions

Among the most common causes of injector failure may be the following:

• The injector nozzle is coked - in this case, increased fuel consumption may be observed, vehicle dynamics will decrease, and engine starting will be difficult at subzero ambient temperatures. Otherwise there are no differences.
• The injector valve does not close hermetically (“the injector is snotty” - note) - here there may be increased fuel consumption, “tripleting” and increased detonation (about checking the knock sensor here), unstable idling.
• Valve sticking - engine troubles. In order to diagnose it, with the engine running, turn off the power supply to each injector in turn. With a non-working injector, no changes in engine operation will be observed, but with a working injector, the speed will drop.

Checking Lada Priora injectors

As mentioned above, both the fuel system ECU and the injector itself can fail. To carry out a complete diagnosis of the ECU, special software is required, which the average motorist simply does not have. Therefore, the only option is to diagnose the machine at a service center. The program, connected to special equipment, will quickly detect ECU errors and correct them.

A full check of Priora injectors is possible only on a special stand

And if problems arise in the mechanical part of the injector, then the diagnostic program will be useless. The maximum that it can do is indicate which cylinder is not working correctly. After this, the car owner can only replace the failed injector on the specified cylinder, since these devices cannot be repaired.

Cleaning injectors with additives

One of the methods for cleaning injectors is adding cleaning additives to gasoline. No one can say for sure whether this will be “useful” for your car. At the moment, a large number of similar additives are produced, and each of them has its own effect on the injectors and the engine as a whole. You also need to take into account the degree of contamination of the injectors, each car has its own. Therefore, even if everything turned out well for your neighbor, things may not turn out so joyfully for you. Here you already need to think for yourself.

How to remove injectors?

First of all, you need to remove the injectors. To do this, first remove the terminals from the battery. We disconnect the wiring from the injectors; by the way, don’t forget to write down which wire comes from where. Next, you need to relieve the pressure in the fuel rail; for these purposes, there is a special bolt on it: place a rag under it and unscrew it slightly, when the fuel stops oozing, tighten the bolt in place so that you don’t forget about it later. After this, unscrew the screws that secure the fuel rail with injectors to the intake manifold and carefully remove the entire structure. We take out the injectors from the ramp. Try not to damage the sealing elements; be doubly careful if you did not purchase them to replace them.

An example of dismantling a fuel rail on a VAZ 2110.

Inspect the injectors: on one side there will be a supply channel, and on the other side there will be a spray nozzle, which may be covered with a brown oil coating. There will also be connection contacts on the side. Some injector models will still have a mesh filter on the supply channel, which must be removed along with the rubber seals before cleaning.

Let's move on to assembling the system for cleaning. To do this, we need to securely connect the spray tube of the cleaning can and the supply channel of the nozzle. In some models of nozzles, to do this, simply wrap electrical tape around the end of the tube that comes with the cleaner and then insert it tightly into the feed hole in the nozzle. If this is not possible, you will have to select a hose of the required diameter and use labor, electrical tape and “dancing with a tambourine” to make an adapter. Although, to be honest, it is not difficult at all.

Here are photos with examples:

Next, you should assemble the electrical circuit to open the injectors. To do this, one wire will connect the plus “+” on the battery, the light bulb and the designated plus on the injector terminal (the designation may be implicit, so it’s better to check the instructions). We connect the second wire from “–” to the button from the doorbell and to the second terminal of the injector.

We attach the hose from the cleaner to the nozzle, create pressure by pressing the valve on the can, and press the button for a couple of seconds, opening the nozzle (you should see a fine fuel torch escaping from the nozzle nozzle). We continue cleaning until the torch becomes uniform. We carry out this procedure with the remaining nozzles.

Now we install the injectors and reassemble the disassembled one in the reverse order. As experts and repair manuals advise, it is better to replace all rubber seals, but honestly, if they are in good condition, not stretched or “stiff,” you can leave the old ones. Do not forget, of course, to lubricate all seals with machine oil before installation.

After assembly, turn on the ignition to increase the pressure in the fuel system, and check all elements for fuel leaks, tighten the connections if necessary; if this does not help, then most likely the recommendation from the instructions for replacing the seals with new ones was just for you.

For those who have successfully tested the leak test and the engine starts and runs smoothly, I congratulate you, you have correctly flushed the fuel injectors with your own hands.

Cleaning injectors on Kalina

Good day everyone! I continue to try to combat the high fuel consumption of my swallow. I've heard and read that cleaning the injectors can help. In principle, I won’t write anything new here, because there is a lot of information on this topic on the Internet, but maybe my report will still be useful to someone. So, first of all, these same injectors need to be removed. To do this we need two 17mm open-end wrenches and a hex screwdriver. I also needed a mount, but more on that later.

The first step is to reduce the pressure in the fuel rail so as not to fill everything with gasoline. To do this, remove the hatch in the center console under which the diagnostic connector is located.

To the right of the connector is the fuse box, the fuse in the center is responsible for the operation of the fuel pump. It needs to be taken out. Next, we start the car and wait until the fuel in the ramp runs out and the car stalls. For me this happened in 15-20 seconds. Turn off the ignition and open the hood. Before removing the injectors, I used a compressor to blow through the installation sites into the inlet manifold so that dirt would not get into the engine.

Next, remove the negative terminal and disconnect the injector power connector. For convenience, I also disconnected the connector from the phase sensor. We carry out further work ONLY ON A COLD engine. There may be gasoline residues in the rail and fuel hose, which can happen if they come into contact with a hot manifold, I think there is no need to explain. Using two 17mm wrenches, we disconnect the fuel hose from the ramp (it’s good that Kalina a power system without return, but then there would be two hoses). I had a slight gas leak.

The ramp is held on by two bolts, to unscrew which we need a hex screwdriver. We unscrew them.

But then the dancing with the tambourine began. The fact is that it is quite difficult to get to the ramp from the right side (if you don’t disconnect anything). I managed to crawl up... I wobbled and rocked this ramp, damn it, and shook it, but I couldn’t get it out. I had to resort to using a mount. With much grief, I still managed to remove...the ramp...but without the injectors! The injectors remained in the manifold. An indicative point: two rubber seals from the injectors, when removed, remained in the ramp! Somehow, I pulled out the injectors, one at a time.

Having examined the injectors at home, I was a little upset, the problem was clearly not in them, they were quite clean. But since I’ve removed it, I need to continue the procedure!

Many people use a carb cleaner bottle and a five-cc syringe for cleaning, but I decided to go a different route - I decided to assemble a device for washing. We will need a plastic bottle (some kind of strong one, like Pepsi or Coca-Cola), two nipples from a tubeless tube, and a desire.

You need to unscrew the nipple from the nipple in the plug. We connect an ordinary car compressor to the nipple at the bottom of the bottle. First, to check the tightness, I pumped the empty device with air, pumped in five glasses - I didn’t leak air anywhere. I bought some inexpensive carb cleaner as a cleaning liquid (unfortunately, I didn’t take a photo), but after opening the bottle, I decided to stop using it . The fact is that in terms of smell, color, and consistency it was ordinary gasoline. I read on the Internet that clean the injectors with solvent, I just had a bottle of 646, so I decided to use it. First of all, I removed the rubber bands from the injectors (they turned out to be in good condition) and soaked the injectors themselves in solvent for a day. After a day, I cleaned the injectors with an old toothbrush, but I couldn’t completely remove the plaque from the bodies. Next came the cleaning process itself. We connect the nozzle to the hose of the device, pour solvent into the bottle, tighten the cap tightly, pump air into the bottle (I pumped 4 glasses) - that’s it, the device is ready for use. To open the injector, voltage must be applied to the contacts. I read on the Internet that 12 volts is too much, you need to apply voltage in series, through a 12V light bulb. That's what I did, but the nozzle did not open. Well, I think I screwed up the injector, just for luck, I applied 12 V directly - the injector opened (Simmens injectors). In general, we place the nozzle of the injector in some container (I used a glass jar), turn the inflated bottle over and, in short pulses (2-3 seconds each), apply voltage to the injector. I washed all the injectors several times in both directions. The torches turned out to be smooth and identical on all nozzles, the color of the solvent after repeated washings practically did not change.

Next we assemble the ramp. Lubricate the installation sites of the rubber rings and the rings themselves with engine oil. Since the corrugated hose on the wires had partially collapsed over time, I wrapped the wires with electrical tape.

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We install it on the car in the reverse order. The installation did not cause any difficulties. I didn’t feel any effect from the procedure, except that the engine started running a little more steadily, fuel consumption did not change.

Good luck to everyone on the roads! No nail, no rod, no camera!

Stages of injector flushing

Injector flushing takes place in six main stages:

• First of all, the ramp is disconnected from the fuel line, and a homemade device is connected to the latter.
• Next, you need to turn off the fuel pump and remove its fuse. Otherwise, place a canister under the power unit, where gasoline will drain from the fuel pump.
• After this, the cleaning agent with gasoline in the required proportion is poured into the bottle. The connected pump creates a pressure of about 3 bar in the bottle (no more!).
• Let's start the engine. Thus, the engine should idle for 15 minutes.
• Next, turn off the engine and wait another 15 minutes. Over this period of time, the cleaning liquid will thoroughly soften the deposits. After which the engine must be started again.
• The washing process will stop when all the product has run out. In this case, it is necessary to ensure that the pressure in the bottle remains at 3 bar.

At the end of the flushing, it is necessary to carefully dismantle the homemade device and connect the engine to the standard fuel supply system.

After which you should start the engine for another 10 minutes, during which time the cleaning agent will completely burn out of the system. Along with this, you can check the tightness of the standard fuel system.

If no problems were noticed in the operation of the engine, then flushing the injectors can be considered successful.

Causes of injector contamination

The structure of the mixture changes, and an excessive amount of air or fuel appears in it. Engine performance decreases, the on-board computer tries to adapt the car to new conditions, supplying even more gasoline, which cannot burn completely.

READ Kalina 2 speed sensor where is it located

Gasoline injectors work even worse in winter, when fuel evaporates more slowly. This leads to more intense pollution.

Washing option with removal

Other methods of cleaning injectors require removing them from the engine. It is more complex, but at the same time you can evaluate the degree of cleanliness of the injectors themselves. This is the method that many car enthusiasts use. To flush gasoline injectors, you need zip ties, a meter-long piece of wire, a small hose suitable for a cleaning agent sprayer, and a battery.

The cleaning principle is as follows. You need to put the hose on the sprayer and insert the other end into the nozzle. Now you need to supply current to the injector using a wire.

However, it is better to use a 9V crown, since this is the voltage supplied to the injectors. When the nozzle has opened, cleaning fluid can be supplied.

Dismantling injectors on Kalina.

• This device for washing injectors is characterized by more reliable cleaning, since the entire process of liquid passage through the nozzles shows the degree of contamination.

Therefore, you can understand how well the nozzle . completely clean nozzle will spray cleaning fluid rather than stream it.

It is important to know that injector cleaning liquids can easily corrode fabric and skin, which means you must follow safety precautions when working with this liquid. It is necessary to use rubber gloves, as well as special clothing, so that the liquid does not get on the skin.

• Also, do not stand on the mowing line spraying liquid and do not direct it at others, because with such a product you can cause irreparable harm to yourself and others.

When cleaning injector nozzles may be useless

Routine washing of the injector and injectors without removing it yourself or at a service center should be carried out every 10-20 thousand kilometers. If you clean the injectors after a longer distance, there is a risk that this procedure will no longer be useful.

Such neglect can ultimately lead to severe damage not only to this part, but also to other interconnected engine components. In this case, simply cleaning the injector will not get rid of it; the engine will need repair.

Buying new components, including injectors, is labor-intensive and not cheap. Therefore, cleaning the injector should not be put on hold, especially in cases where signs of a malfunction have already appeared.

But the best option is to prevent the problem from occurring by cleaning the injectors from time to time without removing them, for example, before changing the engine oil. Such prevention will help protect your car from unnecessary problems with engine injectors.

Do-it-yourself methods for washing the injector and injectors without removing them

to clean the injectors without removing them from the engine:

• Pouring a special cleaning agent into the fuel tank;
• By connecting a homemade device with a cleaning mixture to the fuel system of the power unit.

The first method is the simplest and takes very little time from the driver. It is used to clean injectors after a short mileage (less than 15 thousand kilometers) and only for prevention. In case of pronounced deviations in engine operation, this method is ineffective.

The second method is a little more complicated and requires more time from the car enthusiast. However, the effect of washing injectors with this method will be more noticeable, since its efficiency is an order of magnitude higher. It is used in more advanced cases, in case of obvious problems with the injector or after 15-20 thousand kilometers. Below we will analyze each of these injector flushing methods in more detail.

Replacing injectors

The difficulty in identifying problems in the operation of injectors is that the fuel system is quite branched and it is necessary to diagnose the functionality of all its parts. For example, a malfunction such as a decrease in engine power can have two reasons - failure of the injectors or exhaustion of the pump's life.

Clogged injectors can result in sudden jerking of the engine while driving or unstable idle speed. In addition, an increase in fuel consumption can be considered a sign of injector failure.

You can check the functionality of each injector even without removing them. Simply start the engine and remove the wires from the connector of each injector one by one. If immediately after removal the engine starts to twitch or stalls, then the injector is fine. If the stability of the engine does not change with removal of the wire, then the injector needs to be thoroughly cleaned or even replaced.

Methods for cleaning injectors

Today there are two effective methods for cleaning elements. To choose the one that will be most effective, you will have to study both options. So, washing injectors on special stands is popular.

For this purpose, special cleaning fluids are used. This method is quite effective. But if you clean old and very dirty injectors, it will not give any results. The stand effectively cleans ceramic mechanisms. Processing with liquids is also used. In this case, it is possible to wash the injectors without removing them from the engine, or with removal. But that's not all. Below we will consider another, no less popular method.

Symptoms of a problem

If you clean and maintain the injector assembly in a timely manner, they can last quite a long time. But when to clean the elements is difficult to determine, so there are a number of signs of malfunction.

• Starting the engine with difficulties or not the first time.
• Loss of power and traction.
• Troubling is a clear sign of uneven fuel supply.
• Increased consumption.
• Jerking of the vehicle in the winter season.

If the above symptoms occur, it is necessary to urgently clean the injectors. After the procedure, the performance of the car engine should return to normal. If this does not happen, then you should look for reasons in another place, such as the fuel pump, fuel filter or cylinders.

Troubleshooting

To quickly check the injectors without removing them, you will need an indicator screwdriver. It consists of a metal rod and handle on which a switch and a contact are located to create a conductive circuit, clamped by one of the fingers. When moving the switch forward towards the rod, the device becomes less sensitive; when moving to the upper position, its sensitivity increases. In the first case, the red indicator lamp will light up or flicker, in the second case, the green lamp will light up.

Before carrying out the test, the screwdriver switch must be moved forward, towards the working part (rod) until it stops, and your finger must be pressed against the open contact located on the handle of the indicator screwdriver. The hand must remain in this position during the entire test, closing the electrical circuit, otherwise there will be no indication.

The working rod of the screwdriver must be positioned so that it touches the metal bracket on the block holding the nozzle. There is an opinion that it is enough to simply bring the rod to the block for an indication to occur, but this is not so. The metal clamp catches the electromagnetic pulse generated during the operation of the injectors; a potential difference and alternating currents arise in it, which the device records.

This test checks the injector while the engine is running, so it must be started and left at idle. When the rod of the indicator screwdriver comes into contact with the metal bracket on the screwdriver, the red indicator should light up. This checks performance on all cylinders. If the injector of one of the cylinders is not working, the indicator will not light or blink.

Using the indicator does not necessarily indicate that the injector is faulty, it signals that it is not working. The problem may be there, or in the voltage supply system, poor contact, failure in the electronic control unit, etc.

Some models do not have metal pad clamps in which currents are generated; in this case, is it possible to determine the faulty injector without removing it from the engine? Yes, this can be done using the same indicator screwdriver. To do this, you need to set the switch in the uppermost position (this is the highest level of sensitivity of the device) and perform additional manipulations.

After starting the engine, the screwdriver rod is brought to the injector block, and no indication will appear, even if it is working. Therefore, you need to attach a metal bracket to the screwdriver shaft, which will serve as an antenna where electromagnetic oscillations will occur. A paper clip carefully pressed around the rod with pliers is suitable for this.

During the fuel injector test, the switch remains in the highest sensitivity up position. With the engine running at idle speed, you need to bring the bracket as close to the block as possible, it should cover it. A blinking indication should appear on the device due to currents excited by the electromagnetic field that occurs during operation of the nozzle. If there is a non-working injector under the column, there will be no indication. This technique is also suitable for pads equipped with a metal bracket.

Conclusion

Testing with an indicator screwdriver will help you quickly find a problem when the engine is misfiring due to an injector, or other problems from the list above arise. If you have this tool, you can carry out diagnostics in your garage, and having identified a malfunction, fix it, if possible. The proposed test only reveals the fact that the injector is not working, and this can be done without disassembling the engine.

To identify the reasons why the fuel does not ignite in the cylinder, more detailed diagnostics and subsequent repairs will be required. However, it is not always necessary to replace the nozzle; there are other reasons why it does not function or is unstable. Sometimes you just need to seal the pad contact and the problem of stable engine operation is immediately solved; in more complex cases, for example, to clean the injectors, you will need to contact specialists.

Source