Replacing the VAZ 2107 fuel filter (injector): instructions, photos and videos

Replacing the fuel filter on a VAZ 2107 with an injection engine

The injectors of injection engines are very sensitive to the presence of foreign impurities and contaminants in the fuel. These parts clog much more easily than jets on carburetor engines, and cleaning or replacing injectors is much more complex and costly than repairing a carburetor.

The fuel filter for the VAZ 2107 (injector) cleans the fuel from impurities that can harm the injection system. It should be replaced after at least 30 thousand km. car mileage, and taking into account the poor quality of fuel at gas stations in the country, much earlier.

Signs that replacement is needed

When the filter becomes clogged, it loses its capacity, so the fuel pump cannot provide sufficient pressure to the injectors, which is especially noticeable when the engine is running at high speeds. There are two main signs that the VAZ 2107 fuel filter needs to be replaced:

• Increased gasoline consumption.
• Reduced engine power.

Replacing it is inexpensive and quite simple. You will need a minimum of tools, a new filter and half an hour of time.

Read also:  Vibration or shaking of the steering wheel when braking - what could be the reasons?

Removing the fuel filter VAZ 2107

Before performing any work on the fuel supply system, which includes the filter, it is necessary to take care of fire safety - relieve fuel pressure and disconnect the battery to prevent spark formation and fire.

To relieve gasoline pressure in the fuel line, you must turn off the fuel pump fuse (F3) and start the engine and let it run for a while. The fuel pumped by the fuel pump will run out.

After this, you can turn off the ignition and unscrew the terminal from the battery.

Important: do not forget to return the fuse to its place!

When the pressure is relieved, the fuel pipe fitting is unscrewed using a pair of open-end wrenches: one should hold the filter so that it does not turn, and the other should turn the fitting nut.

Despite the release of fuel pressure, there is still some gasoline left in the filter, which can spill in the engine compartment. To protect against this, you can spread an old rag or rags under the filter.

When the fuel system pipes are disconnected, you need to unscrew the fuel filter mount and remove it.

Installing the fuel filter

• Install the new filter so that the arrow on the housing is turned towards the fuel rail.
• Tighten the fuel filter clamp.
• Replace the O-rings on the fuel line fittings.
• Tighten the fittings while holding the filter with a wrench.
• Install and tighten the battery terminals.

After completing the work, you can turn on the ignition and start the engine.

With the engine running, you must ensure that there are no fuel leaks at the points where the fuel filter is connected to the main pipes.

At this point, work on replacing the VAZ 2107 filter can be considered completed.

Rough cleaning

The first in the fuel supply system is a coarse filter. It is located directly in the tank. Right on the fuel intake. Usually this is a mesh formation of various shapes. Made from a fine-mesh mesh that is incapable of allowing debris to pass through.

For carburetor cars

This is a conical structure made of thin metal mesh that is put on the intake tubular pipe. It is usually put on without replacement, and only washed occasionally.

For cars with "injector"

Here the question is more serious. Fuel injection on these cars occurs through fuel injectors - “injectors”. The diameter of their passage holes is very small. Therefore, the danger of contamination is an order of magnitude higher than that of carburetor engines, and the possibility of washing is much lower. Accordingly, protection by fuel filters is much stronger. Another feature of the fuel system of “injection” cars is that the pump is located either directly in the tank or right next to it. Now almost 100% of cars have a pump inside the fuel tank. The filter on them is made of plastic and is attached directly to the pump. Can't be cleaned or washed. These filters are only replaced. The replacement scheme is approximately the same for all models. Even with different forms of the fuel filter itself.

Replacing the fuel filter on a VAZ 2107 injector

The fuel filter on every car plays a very important role, cleaning the fuel from various impurities, debris and small particles. Everyone knows the fact that no matter how first-class the fuel is, the presence of impurities in it cannot be ruled out.

It is possible to save a car engine only through the use of fuel filters. This applies not only to injection cars, but also to carburetor cars. As you know, the VAZ 2107, better known as the “seven”, was produced both in carburetor and injection form.

Let's look at the features of replacing the fuel filter on a VAZ 2107 injection and carburetor type.

When it's time to replace

The fuel filter is a replaceable element. Manufacturers of injection cars recommend replacing these devices every 30 thousand km. The filter on the VAZ 2107 must be replaced because the device becomes clogged, losing capacity. This negatively affects the fuel supply system to the injectors, as the pressure decreases.

Contaminated fuel causes malfunctions not only of the injector, but also of the fuel pump, which, due to its duty, has to transport gasoline to the engine compartment of the car. You can determine the need to change the gasoline purifier on a VAZ 2107 by the following criteria:

A decrease in the throughput of the product means that the injectors do not receive gasoline in the required quantity, which significantly affects the power of the vehicle engine.

Sequence of work when changing the filter on a VAZ 2107

To begin with, it should be said that the fuel filter on a VAZ 2107 car is located directly in the engine compartment. To see it, you need to open the hood. The device looks like this, as shown in the photo above.

Replacing the device in question does not present any difficulties, but if the work is being performed for the first time, it is recommended to adhere to the following instructions:

As you can see, you don’t need to be a professional to change the fuel purifier on the “Seven”. It is important to follow the step-by-step instructions and also replace the device in a timely manner. It is better to change this device more often than to do it rarely and too late.

Replacing the filter on a carburetor "seven"

Carburetor VAZ 2107 cars also need to replace fuel filters. The replacement sequence on a carburetor VAZ-2107 is as follows:

On carburetor VAZ 2107 cars, the device in question is also located in the engine compartment. This device is held in place by rubber hoses, so additional fastening elements are usually absent.

In a carburetor engine there is no pressure in the fuel system, so there is no need to relieve the pressure before starting work. The cost of the device for carburetor cars is several times cheaper than for injection cars, but it is recommended to change them more often.

The advantage of a filter for carburetor cars is that the product has a transparent body. This allows you to determine the degree of contamination of the filter part visually.

In conclusion, it is worth emphasizing the importance of the device in question. The absence of a fuel filter would lead to frequent breakdowns in the injector and carburetor, as well as fuel pumps.

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The fuel filter on the VAZ 2107 differs only depending on whether the car has a carburetor or an injection version. Otherwise, neither the size of the engine nor the equipment of the car affects the choice of a gasoline filter. The main manufacturer of this spare part for “sevens” is the Russian company Big Filter.

On the 2107 with an injector, in addition to the main fuel filter, there is also a fuel pump mesh, which is located in the tank.

Replacing air, oil and fuel filters on VAZ 2101-2107

Filters in VAZ cars must be replaced periodically, depending on the mileage. The air filter should be changed every 10-15 thousand.

km, depending on the conditions in which the car is operated, the oil filter along with an oil change, which must be done every 10 thousand km, the fuel filter is changed every 30 thousand.

km or as it gets dirty - it has a transparent body and the level of contamination of the filter element is clearly visible.

Replacing filters on a VAZ

Replacing the air filter VAZ 2101-2107.

To replace the VAZ air filter, the first step is to unscrew the three bolts that hold the upper part of the air filter housing. Then we remove it and take out the old air filter.

We close the air intake hole with a regular rag or rag, and then thoroughly clean the casing of dust and dirt.

We install the new filter in place, removing the protective film or paper from it, close the casing and fasten it with bolts.

Replacing the oil filter VAZ 2101-2107.

The VAZ oil filter must be replaced at the same time as the oil change, at a time when the old oil has already been drained from the engine and new oil has not yet been added. Unscrewing it with bare hands is not always easy; this may require a special key or puller.

After the filter is removed, wipe the landing pipe with a dry, clean cloth. Before installing a new filter, you need to moisten the rubber o-ring with oil and pour a little inside (enough so that it does not leak out during installation). Then screw the filter onto the seat and tighten it by hand.

After replacing the filter, you need to start the car and let it run for 2-3 minutes to flush out the oil.

Replacing the fuel filter VAZ 2101-2107.

Before replacing the VAZ fuel filter, for safety reasons, it is necessary to remove the negative terminal from the battery. The filter is directional and is attached using clamps to the fuel line hoses.

Before removing the old filter, it is best to clamp the hoses with any available means so that any remaining gasoline does not leak out. After the hoses are clamped, you need to unscrew the clamps and remove the old fuel filter.

If the clamps are new, there is no point in changing them, but if they are already worn out, then replacement is required. We put the hoses on the new fuel filter and secure them with clamps.

It should be noted that when buying a car second-hand, it is necessary to change not only the oil, but also all the filters. In addition, any clogged filter has a bad effect on engine operation, reducing its service life and reducing key performance.

Video of replacing the air and fuel filter of a VAZ 2107

Carburetor DAAZ 21073 - device

The device of the Dimitrovgrad Automotive Aggregate Plant is designed for mixing fuel and air and consists of two main components:

1. Frame;
2. Top cover.

The device is also based on a float chamber for balancing the level of fuel supplied to the diffuser, an accelerator pump, a forced idle economizer and an econostat. The top cover contains: an emulsion tube or emulsion wells, fittings designed for atomizing fuel in the diffuser, as well as an air damper necessary for cold starting of the power unit. The Solex 21073 carburetor on the Niva is installed and configured from the factory, and its design and calibration data provide good dynamic performance with minimal fuel consumption.

Calibration data

Replacing the fuel pump for a VAZ 2107 injector, installing an electric fuel pump and replacing the mesh

Cases when a VAZ 2107 injector fuel pump needs to be replaced are not that frequent, and its service life depends not only on the quality of the gas pump itself, but also on the condition of the gas tank. The reason I had to change it was because a small speck got into it because the filter came off.

Electric fuel pump device

The design of an injection fuel pump is simple and can be divided into two parts:

The most important thing is its structure itself. The electric fuel pump itself is hermetically sealed to protect against fuel ingress. The fuel enters the pump through the filter and the intake hole and is supplied to the power system through the outlet hole (sealed from the electric motor).

Here is a diagram you can find. I would like to note that it does not happen that the motor rotor rotates in liquid and even in gasoline. Firstly, a spark forms on the commutator when the engine is running. You understand that this will lead to a fire. Secondly, rotor rotation in liquid is so difficult that gaining speed and creating pressure is simply out of the question.

Therefore, gasoline passes through the engine through a special channel, and the design of the engine itself is hermetically sealed.

Where is the fuel pump on the VAZ 2107 injector?

On carburetor engines, the fuel pump is installed on the right side of the block and is visually accessible. On the injector, it is located in the gas tank and only the output tubes coming from it are visible, and replacement is somewhat more complicated.

Symptoms for replacement

Signs of a malfunction of the VAZ 2107 injector fuel pump appear both when starting the engine and during operation:

• “heavy”, long engine start;
• jerking when moving;
• uneven operation at idle;
• The fuel pump doesn't pump.

Diagnostics

The primary conclusion whether the fuel pump is working or not can be assessed by ear when the ignition is turned on. If you don’t hear a quiet buzzing noise from behind, then you need to check the voltage supply to the gas tank block and then draw a conclusion about its malfunction.

You can check the serviceability of the fuel pump using the MTL-2 pressure gauge; this is the most correct way. You can somewhat roughly estimate the pressure using air pressure gauges to check tire pressure. To do this, screw a rubber hose to the sensor and connect it to the fuel system.

You can do without instruments at all; to do this, unscrew the fuel hose from the filter, place a container and turn on the ignition. In one minute, about 1 liter should be poured into the container.

The pressure of the VAZ 2107 injector fuel pump when the ignition is on should be 4.0 atmospheres, and when the ignition is running 2.8-3.2. In reality, the pump pressure is different and was slightly less, but this may be an error in the pressure gauge.

The carburetor pump is checked by setting the camshaft position by cranking the engine so as to ensure free movement of the pump foot. The hose is unscrewed from the carburetor or filter and the presence of fuel supply is determined by pressing the foot.

How to replace a VAZ injector fuel pump

To replace the fuel pump on an injection vase you will need:

I recommend removing the gas tank mount for ease of repair work. To remove the fuel pump you need:

• disconnect the pressure relief pipes in the gas tank;
• Unscrew the main pipelines using 2 17mm wrenches;
• remove the gasket from the gas tank neck;
• unscrew the tank mount;
• move the tank to the side;
• remove the power and fuel level block;
• unscrew the fuel pump flange;
• remove the fuel pump filter;
• remove the tube from the pump after heating it;
• We take out the old pump and install a new one.

When installing the filter, do not hesitate to give it a good tap, otherwise it may fall off like mine. The fuel pump mesh on the VAZ injector is replaced if the old one is dirty or torn. Its replacement is carried out in the same way. Usually it is sold complete with a fuel pump; if not, you will have to buy it, the price is 25 rubles.

Reassemble in reverse order. We heat the hose again in boiling water; if the mounting location of the old electric fuel pump does not allow the part to be properly secured, then we cut it off.

Check the integrity of the gasket between the flange and the gas tank; if it is torn, there will be a smell of gasoline in the cabin.

Important. When choosing, pay attention to performance and maximum pressure. I had Bosch 0 580 454 456 and replaced it with a close analogue of FR 453-453 from WEBER.

Characteristics:

• OEM part number 21083-1139009-01;
• Installation of VAZ 2108 - 2115;
• Pressure - 580 kPa;
• Productivity - 60 l/min;
• Voltage - 13.5 V.

Consumption per 100 km at a speed of 120 is about 8 liters. Very pleased.

Replacing the fuel pump VAZ 2107 injector video:

Safety

Regardless of the type of engine on your VAZ 2109, the procedure for replacing the fuel cleaning device must be carried out in compliance with certain safety measures.

1. Do not smoke under any circumstances while repairing the fuel system. Be patient. We do not recommend going outside to smoke. Your clothes may be oily or saturated with fuel. The slightest ember and problems cannot be avoided.
2. Always keep a fire extinguisher near your car. When changing the fuel cleaner, place it next to you. A useful measure that has saved more than one person and saved more than one car.
3. Avoid contact of fuel with eyes. It is best to work with safety glasses.
4. Work on the fuel system only in well-ventilated areas. If repairs are being carried out in winter, it is better to dress warmly and open the garage doors.
5. Do not change the filter outside during extreme heat. Even high air temperatures and direct rays of the sun can become a source of fire.
6. You can work on the fuel system only when the engine has completely cooled down.

A fire extinguisher is a must have at hand.
According to the operating manual, on injection VAZ 2109 the fuel purifier should be changed once every 20 thousand kilometers. In fact, given the operating conditions, this period should be halved. As for the carburetor, it is recommended to change the filter every 10 thousand kilometers. In practice - about 7 thousand kilometers.

Replacing this device is a fairly simple task that even a beginner can handle. The most important point is compliance with safety measures.

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Installing a gas tank on an injection VAZ 2107: detailed instructions

Many VAZ 2107 car owners have probably thought about changing the carburetor to an injector. And not in vain, because according to the Euro standards in force in Russia, an injector is many times more preferable.

The carburetor is quite complex, so a car enthusiast may experience difficulty setting it up. But the injector is simpler. The only thing that can happen to it is clogging of the channels.

To prevent this from happening, it is necessary to regularly flush the injectors.

VAZ 2107

The design of the injection engine of the VAZ 2107 car

This design ensures fuel storage, purification from impurities and supply, along with air purified through a filter, into the engine cylinders.

The system consists of several components:

• Gas tank;
• Gasoline pump;
• Fuel lines;
• Fuel rail with injectors;
• Fuel filter;
• Air filter;
• Air supply channels;
• Throttle valve;
• Fuel vapor recovery system.

VAZ 2107 injector

Gas tank and fuel pump

In a VAZ 2107 car, the gas tank is made of two steel parts, lined with lead on the inside, and is located on the right side of the trunk. Fuel is pumped out of the gas tank by a gas pump, which has a filter that does not allow large particles of contaminants to pass through. Next, gasoline enters the fuel filter through the fuel pipe.

Fuel filter and fuel rail

The fuel filter is built into the fuel line between the fuel pump and the rail and consists of a paper filter element and a protective metal housing in the shape of a cylinder.

In it, the fuel is finally purified and enters the fuel rail, which is a bar that supplies fuel to four injectors. The ramp is secured with two screws to the intake manifold, into which fuel is injected through the injectors.

There is also a valve installed on the ramp that keeps the fuel pressure within normal limits (280-320 kPa), which is necessary for the proper operation of the entire injection engine.

Air filter

The air filter is located in the engine compartment of the VAZ 2107 car. Like the fuel filter, the air filter is replaceable, made of paper. To make it possible to change the filter, its cover is removable. After cleaning, the air enters the throttle valve through the channel.

Throttle valve

The throttle valve regulates the amount of air entering the cylinders. It is attached to an axis in the housing, around which it rotates. The housing also contains a coolant channel connected to the cooling system, and fittings connecting the damper to the adsorber.

Evaporative emission system

Environmental requirements of Euro II provide for the presence of this system in the VAZ 2107 car. It consists of an adsorber, several valves and connecting hoses. The valves are located both in the engine compartment (purge valve), in the niche of the gas tank (safety and bypass), in the line of the system itself (gravity).

The adsorber consists of three pipes:

Injector installation

Let's take a closer look at how to install an injector on a VAZ 2107. First of all, you need to drain some of the coolant, after which the carburetor, intake and exhaust manifolds are removed.

An electric air blower is installed under the injector, so if a VAZ 2107 has a forced air blower, it also needs to be removed. The first thing to replace is the crankshaft pulley. To place the sensor on it, the new pulley must have special teeth.

Next, the front engine cover and sealing gaskets are replaced.

During installation, you will need a coolant temperature sensor. To install it, you need an underflow located on the tee of the block head. A threaded hole is prepared for the sensor, after which the ebb is installed back. The sensor itself will come in handy after installing new wiring.

Then the manifolds are installed with all the equipment attached to them, such as a fuel rail with injectors, a throttle valve and a receiver. The position sensor and idle air valve are bolted to the base of the manifold.

The fuel pump and ignition system elements are replaced with plugs, after which the fuel filter is installed in any convenient place.

The gas tank is secured with clamps, and the fuel outlet line is connected to it. If the gas tank is not replaced with a new one, but the same one is installed, it is necessary to wipe it from the inside with a solvent.

The electric fuel pump is installed approximately in the place where the gas tank is located, under the bottom of the car. A fuel line is also installed at the inlet to drain gasoline from the system into the gas tank.

You can stretch it in any way, but it is important that the line and the gas tank are tightly connected.

Next, the ramp is attached to the manifold, and new wiring is installed. To install the latter, you need to have a good knowledge of the electrical equipment of the VAZ 2107 car. An on-board computer, wiring harnesses and injection sensors must be installed. The last step is to install the elements of the ignition system, high-voltage wires and the remaining sensors.

Pros and cons of an injection engine

One of the advantages is that the injector has a much smaller number of disadvantages during operation, which is especially noticeable at low ambient temperatures. Another plus is higher efficiency, meeting European standards.

But there are also disadvantages:

• The injector requires higher quality gasoline than the carburetor;
• Regular washing of the injectors is mandatory, otherwise they will become so clogged that neither flushing nor cleaning will help them;
• New injectors are quite expensive given the current economic conditions.
• In the event of a breakdown, repairs will take longer, and besides, not every car enthusiast will be able to repair the engine themselves

If you are willing to cover possible costs, then an injector will be a more acceptable option compared to a carburetor.

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Scheme and principle of operation

The types and modifications of carburetors for a given car can be very different, but the principle of operation remains the same.

When starting the engine cold, the driver closes the choke to limit the flow of air and increase the amount of gasoline. This makes it easier to start and brings the speed necessary for stable operation.

Carburetor 21073 DaAZ device and principle of operation: diagram of the design and operation of the carburetor I - first chamber; II - second chamber; 1 — accelerator pump drive lever; 2 — adjusting screw of the starting device: 3 — diaphragm of the starting device; 4 — air channel of the starting device; 5 - solenoid shut-off valve; 6 — idle fuel jet; 7 — main air jet of the first chamber; 8 — idle air jet; 9 — air damper; 10 — sprayer of the main dosing system of the first chamber; 11 — accelerator pump nozzle; 12 — nozzle of the main dosing system of the second chamber: 13 — econostat nozzle: 14 — main air jet of the second chamber; 15 — air jet of the transition system of the second chamber; 16 — channel for balancing the float chamber; 17 - float chamber; 18 — needle valve; 19 — calibrated hole for fuel bypass into the tank; 20 — carburetor fuel filter; 21 — fuel supply fitting; 22 — power mode economizer diaphragm; 23 - fuel jet of the power mode economizer; 24 — ball valve of the power mode economizer; 25 - float; 26 — econostat fuel jet with tube; 27 — fuel nozzle of the transition system of the second chamber with a tube; 28 — emulsion tube of the second chamber: 29 — main fuel jet of the second chamber; 30 - outlet of the transition system of the second chamber; 31, 33 — throttle valves: 32 — slit of the transition system of the first chamber; 34 — outlet of the idle system; 35 — carburetor heating block; 30 - adjusting screw for the composition {quality} of the idle mixture; 37 — engine crankcase ventilation fitting; 38 - fitting for supplying vacuum to the vacuum ignition regulator; 39 — vacuum selection fittings for the recirculation system; 40 — main fuel jet of the first chamber; 41 — emulsion tube of the first chamber; 42 - ball valve of the accelerator pump; 43 — accelerator pump diaphragm.

During the warm-up process, air intake is increased to reduce speed and eliminate interruptions. Thus, the air damper opens completely and the amount of gasoline is reduced. Other methods of warming up are not provided for by the design.

Gasoline is supplied through the fuel filter to the float chamber, and then to the main metering system of the mixing chamber. The scheme for pumping air and mixing it with gasoline in the diffuser occurs due to the vacuum that occurs during the operation of the valve mechanism and pistons, compressing and pushing out the working mixture.

The second chamber system is designed to increase air flow to the nozzle when the engine is running under heavy load, when the speed is high.

To ensure that the engine runs stably at idle, and at low speeds to prevent it from stalling and eliminate interruptions, an idle system is provided. And to maintain the level of fuel used in the Solex 21073 carburetor, there is a whole scheme for the operation of the float system. Let's consider the operation of each system separately.

Signs of a clogged filter device

The filter has special filter paper, the cells of which become clogged over the course of vehicle operation. Because of this, fuel flows worse, which causes problems with the engine itself. You can detect that the filter is clogged by several obvious signs.

• Fuel consumption has increased sharply;
• Your car begins to stall frequently at idle;
• At higher speeds, failures in engine operation are observed;
• Starting the engine is carried out with certain difficulties;
• The engine falters and the power drops noticeably;
• When driving, the car brakes spontaneously, although you did not press the brake pedal;
• The car rarely jerks when going uphill.

As you can see, there are many signs, and they differ from each other in many ways. These signs do not indicate 100% that the problem lies with the filter. Similar phenomena occur when there is a malfunction of the electronic control unit, sensors, throttle valve, spark plugs, detonation, and so on.

How to check that the problem is in the filter? Easily.

1. Connect a nanometer to the nipple on the fuel frame of the injectors;
2. Start the engine;
3. Measure the pressure;
4. If the indicators are lower than those indicated in the technical documentation of the VAZ 2114, it means that the cleaner is really clogged.

Measuring pressure in the fuel rail of a VAZ 2114

Idle system

In some situations, engine operation must be ensured even when the car is in neutral, when the speed is too low. At such a moment, the vacuum is insufficient and fuel will not be able to pass through the main metering chamber. A forced idle system is provided specifically for this purpose.

To do this, air is supplied through the main idle fuel jet into the first chamber. The fuel will then flow to the idle fuel jet. The air also passes through a special jet through a separate channel. This design allows the engine to operate even at low speeds, and when the throttle valve is opened, the power mode economizer begins working, which is considered as a transition system.

However, the system has a number of disadvantages when coasting:

1. When the speed decreases by releasing the gas, fuel consumption continues;
2. When switching to neutral gear, it increases completely.

Especially for this purpose, the calibration data also includes an EPHH, which turns off the fuel supply when coasting. Its operation continues until the speed drops to 1200 rpm and turns off when the throttle is opened. But when the car is stationary, it does not work.

Fuel pump repair

To dismantle the electric fuel pump you will need:

• Phillips and flathead screwdrivers;
• 7mm tubular socket wrench.

Removing the electric fuel pump

Dismantling the electric fuel pump is performed in the following sequence:

The negative terminal of the battery is disconnected.

If you need to replace or wash the coarse filter, you need to pry it off with a screwdriver and remove the old mesh. The new filter is installed by pressing tightly.

The fuel pump is installed in reverse order.

Video: how to replace an electric fuel pump at a service station

Removing the mechanical fuel pump

To remove the mechanical fuel pump, you need to prepare a Phillips screwdriver and a 13mm wrench, then:

1. Loosen the clamps of the inlet and outlet hoses and remove the hoses from the fittings.
2. Unscrew the two pump mounting nuts with a 13 mm wrench.

After this, you need to evaluate the condition of the pusher and, if necessary, replace it.

Disassembly

To disassemble a mechanical fuel pump you will need:

• keys for 10 and 8;
• Phillips screwdriver.

To disassemble a fuel pump of this type, you must:

Unscrew the top mounting bolt.

After this, you need to evaluate the condition of the parts of the diaphragm and the mesh filter. If necessary, replace worn, deformed or damaged components.

Replacing valves

New valves are included in the fuel pump repair kit. To replace valves, you need a needle file and attachments for pressing out old valves. Replacement is carried out as follows:

The cores are ground off with a needle file.

Installing a fuel pump

Reinstalling the mechanical fuel pump is performed in the reverse order of removal. The most important point during installation is the correct choice of gaskets. There will be two such gaskets:

• adjustable thickness 0.75 mm or 1.25 mm;
• sealing - 0.3 mm.

Between them there is a heat-insulating spacer. When installing a fuel pump, you must:

1. Place the sealing gasket.
2. Insert the pusher.
3. Place a heat-insulating spacer on the studs.
4. Install the adjusting shim.

Press all installed gaskets tightly. Turn the crankshaft by the pulley with a wrench so that the pusher protrudes from the edge of the gasket minimally. The protrusion of the pusher should not exceed 0.8–1.3 mm. If the minimum extension of the pusher differs from this value, you need to select a shim of a different thickness.

The electric fuel pump of the injection “seven” is responsible for providing the engine with fuel and maintaining the pressure in the power system at the required level. An electric fuel pump, as a rule, does not overheat, and therefore is more reliable in operation than a mechanical fuel pump. Proper operation and timely maintenance of the fuel pump can ensure its long-term trouble-free operation.

Cleaning the fuel pump is a fairly urgent procedure that must be carried out when the following symptoms appear:

• Difficulty starting the engine with the starter;
• reduction in vehicle acceleration dynamics;
• jerking when pressing the gas pedal sharply;
• floating speed and sluggish engine response;
• the engine stalls in transition modes after pressing the accelerator, etc.

In some cases, when you press the gas, the car practically does not accelerate, overcomes inclines with great difficulty, and does not overtake. There may be several reasons for such a malfunction, but often the problem is localized in the fuel pump area. Next, we will consider issues related to the electric fuel pump, which is installed in the gas tank of injection cars.

Read in this article

Troubleshooting - Solex carburetor 21073

The Solex carburetor 21073 was installed on the Niva 21213 for quite a long time, after which repairs and adjustments are quite common.

Therefore, the following malfunctions cannot be excluded:

• Higher fuel consumption;
• Poor starting qualities;
• Power reduction;
• Unstable engine operation at idle.

The main malfunctions during carburetor operation originate from low-quality fuel, which has foreign particles. They are the main reasons that clog the jets and channels, leading to malfunction of the device. The installed carburetor 21073 1107010 DAAZ on Niva has a device in which the jets are most susceptible to contamination. Therefore, diagnosis must begin with them.