Faulty injectors VAZ 2114 symptoms

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Comments 26

I don't know if it will help. Due to the malfunction of two coils, two injectors did not spray. Those. the brain gives the command: no spark, no injector. I would start digging for errors in the ecu first.

I think I need to watch it anyway. Thank you

no, check them on the bench, if they work, then look at the wiring and the last option is a malfunction of the computer

No. The phase sensor could break down if two of the same injectors do not work. Or the braid itself to the injectors is acting up. And yes, a diagnostic computer costs 1000 rubles. Will save a lot of money and nerves)))

How come, a diagnostic computer costs 1000 rubles? where is it?

# I was a little mistaken in the price, it has gone up in price, but you can find it up to 1500. There are more expensive ones, but the point is only in convenience and somewhat more advanced functionality. In Krasnodar, there seems to be a State dealer www.shtat.ru/gde_kupit/krasnodar/

No. The throttle is needed to pass air. And the Throttle Position Sensor (TPS) is needed to read the opening angle of the valve itself and, accordingly, to supply the correct amount of fuel. There seems to be some kind of sensor at the injectors. It is responsible for the alternating operation of the injectors. I even changed it... but I forgot what it is called. (

A faulty injector (nozzle) has a negative impact on the operation of the vehicle engine. The sooner the car owner finds out the cause of the malfunction, the sooner he will eliminate it, saving a significant amount of time, nerves and money. Listed below are signs of an injector malfunction that indicate the need for repair and maintenance work.

Weak points of VAZ injection wiring - A116.RU Kazan

Weak points of injection wiring of VAZ cars

Like any car, AvtoVAZ products have inherent flaws. The wiring of the engine control system is constantly being improved by the factory - sometimes in the direction of improving reliability.

Weak places where you need to look first.

DPKV crankshaft position sensor connector. Not even the connector itself, but the wires that go to it. If the DPKV wire is not secured to the bracket on the lower bolt of the timing belt cover or with a clamp to the special eyelet of the cover, the wires break due to constant vibration and movements of the body relative to the engine. Wire strands under the insulation often break; from the outside, these wires appear intact. Also, a loose DPKV wire can touch a hot exhaust manifold - which causes the insulation to melt and the signal wires to short out to each other or to ground through the wire screen.

Speed sensor connector. Quite often, in the area of the speed sensor connector, the wires rub against the gearbox or are very bent. As a result of strong bending, the insulation of the wires is damaged. The speed sensor is located at the bottom of the motor - it quite often gets flooded with water from puddles. In addition, careless car owners periodically spill antifreeze or brake fluid, which can get on the damaged section of the wire. This causes copper conductors to oxidize and turn into dust.

Injector harness wiring. Quite often the wires are located on the fuel pipe attached to the fuel rail. Vibration causes the wires to fray and short to ground.

Most common reasons

There are three main factors that can lead to unstable operation of the fuel injection system:

Low quality fuel is a common problem in all post-Soviet countries.
A long service life can equally be attributed to both advantages and disadvantages.
Unprofessional repair work.

It should be noted that unqualified repairs are the most dangerous factor that can affect the normal operation of the injector. In the absence of certain theoretical and practical knowledge, it is not recommended to try to repair or clean the injector yourself. It is best to entrust such work to professionals who are well aware of all the nuances and features of carrying out work of this kind.

Improper cleaning of the injector can cause harm

There can be a great many reasons for a malfunctioning injector, so in this article we will analyze only the most typical signs of an injector malfunction inherent in engines of various types, and give recommendations for eliminating them.

Main symptoms

Lack of fuel mixture in the injector. Often, the presence of this symptom does not indicate a malfunction of the injector itself, but a failure of the fuel pump, or its incorrect installation after repair work.
In some cases, the reason may be a clogged fuel mixture inlet into the fuel pump. The fuel pump has failed.
Significant increase in fuel consumption. A fairly common phenomenon that indicates a clogged injector. Due to the small diameter of the injector nozzle, even slight contamination can significantly disrupt the mixture formation process, reducing the percentage of engine efficiency. This is explained by the fact that a clogged nozzle no longer forms a cone-shaped cloud of gasoline, which means that a significant amount of fuel begins to burn out in the exhaust manifold. The consequence of these processes is a deterioration in the dynamic characteristics of the vehicle and an increasing load on various electronic equipment of the car: coil, spark plugs, wiring, etc.

Idle speed sensor needs to be replaced

Unstable idle speed of the fuel injection system. This symptom can be the result of many malfunctions. The most likely cause is a malfunction of the idle air control valve or a clogged internal surface of the throttle pipe.

Problems starting the engine. If the vehicle engine does not start while the sounds of the fuel pump are heard, it becomes necessary to check whether the injector has a spark. For these purposes, experts advise using a spark gap.

It is not recommended to resort to checking the spark for a break, because Such actions can damage the ignition module and controller.

Trouble due to cylinder failure

Troit injector. In most cases, the culprit of this symptom is the presence of one or more inoperative cylinders. The breakdown can be eliminated by identifying non-working cylinders and then repairing them or replacing them with new parts.

Overflow of fuel mixture in the injector. This symptom also requires detailed diagnostics, which is best started by checking the sensor responsible for the throttle position.
Professional washing of the injector
The above signs of injector malfunction indicate the need for repair and maintenance work. You should not diagnose and clean the injector yourself if you are not 100% confident in your knowledge and experience. Specialized service stations are equipped with high-tech equipment, which, in addition to cleaning the injector nozzle, carries out its comprehensive diagnostics, showing the mechanical wear of the needle, the actual performance of the injector, etc.

If professional washing of the injector does not solve the problem of injection of the fuel mixture, then a reasonable solution would be to replace the injectors with new ones.

Replacing injectors

Which indicates possible problems with the injector

Let us immediately note that there can be many reasons for unstable engine operation, ranging from a clogged fuel filter, a broken fuel pump, a failed spark plug or a faulty coil, to loss of compression, problems with the timing belt, etc. Along with this, one of the main signs of injector malfunction is difficulty starting the engine, especially when cold, as well as gasoline or diesel consumption (depending on the engine type), which increases noticeably. It is also necessary to note the unstable operation of the internal combustion engine in idle mode, similar to the so-called “triple” of the engine.

Symptoms of a problem

If there are problems with the injectors, a small amount of fuel enters the cylinders. In some cases, powering the engine becomes completely impossible. There are several signs by which you can determine that the problem is in the injectors:

Problems starting the engine. This is due to insufficient fuel entering the cylinders;
The engine is unstable at idle and low speed;
Significant reduction in power and failures in operation;
Increased fuel consumption;
The engine may trip.

Self-check of injectors

Let's start with the fact that automobile injectors are divided into several types, of which two types have found widespread use at different times: mechanical injectors and electromagnetic (electromechanical) injectors.

Electromagnetic injectors are based on a special valve that opens and closes the injector to supply fuel under the influence of a control pulse from the engine ECU. Mechanical injectors open as a result of increased fuel pressure in the injector. Let us add that modern cars often have electromagnetic devices installed.

To check the injectors with your own hands without removing them from the car, you can use several methods. The simplest and most affordable way to quickly check injection nozzles without removing them from the car is to analyze the noise emitted by the engine during operation.

How to check the power supply to the injectors

This check is carried out if the injectors themselves are working, but any of the injectors do not work when the ignition is turned on.

for diagnostics, the connector is disconnected from the injector, after which two wires need to be connected to the battery;
the other ends of the wires are attached to the injector contacts;
then you need to turn on the ignition and record the presence or absence of fuel leakage;
if fuel flows, then this sign indicates problems in the electrical circuit;

Another diagnostic technique is to check the injector using a multimeter. This method allows you to measure the resistance on the injectors without removing them from the engine.

Before starting work, you need to find out what impedance (resistance) the injectors installed on a particular vehicle have. The fact is that there are injection nozzles with both high and low resistance.
The next step is to turn off the ignition and also reset the negative terminal from the battery.
Next you will need to disconnect the electrical connector on the injector. To do this, you need to use a screwdriver with a thin tip, with which you need to unclip a special clip located on the block.
After disconnecting the connector, switch the multimeter to the desired operating mode for measuring resistance (ohmmeter), connect the contacts of the multimeter to the corresponding contacts of the injector to measure impedance.
The resistance between the outer and central contacts of a high-impedance injector should be between 11-12 and 15-17 ohms. If the car uses low resistance injectors, then the indicator should be from 2 to 5 Ohms.

VAZ 2114 injector wiring diagram

The second ends of the black wires are also brought together to points connected to ground. In this case, the pads 12 are connected to the washer pump, and the wires connected to pumps 13 and 14 are connected to the corresponding solenoid valves. The Soldering Iron site exists only through advertising, so we would be grateful to you if you add the site to the list of exceptions.

A - block of headlights and headlight cleaners VAZ; B - cigarette lighter; B - VAZ mounting block, instrument cluster, VAZ ignition switch, windshield wiper and other electrical equipment components for blocks with a different number of plugs - the numbering order is similar; G — relay for turning on the rear fog light; D — alarm switch; E — gear motors for power windows and gear motors for locking door locks; F — interior lamp.

There is one green-yellow wire going to it, but it broke and I can’t find where it came from.

Auto electrics. Reading the car's electrical diagram. Part 1.

The second ends of the black wires are also brought together to points connected to ground. Current measurement module for ACS 30A. Home Electronics for cars. To add your build, registration is required. Prize fund for November Reward I collected 0 0 x.

In this case, the pads 12 are connected to the washer pump, and the wires connected to pumps 13 and 14 are connected to the corresponding solenoid valves. Tell me where he comes. The second ends of the black wires are also brought together to points connected to ground. Home Electronics for cars. Good afternoon, the problem is that the fluid temperature level has stopped showing.

How is electrical power measured? Handheld hair dryer W with temperature control. The second ends of the black wires are also brought together to points connected to ground.

Comprehensive diagnostics of the operation of injectors on the ramp

For such a check, the fuel rail will need to be removed from the engine along with the injectors attached to it. After this, you need to connect all electrical contacts to the ramp and injectors if they were disconnected before removal. It is also necessary to return the negative terminal of the battery to its place.

The ramp must be placed in the engine compartment so that a measuring container with a scale can be placed under each of the injectors.
It is necessary to connect the fuel supply pipes to the ramp and additionally check the reliability of their fastening.
The next step is to turn on the ignition, after which you need to crank the engine a little with the starter. This operation is best performed with an assistant.
While an assistant rotates the engine, check the efficiency of all injectors. The fuel supply must be the same on all injectors.
The final step will be to turn off the ignition and check the fuel level in the containers. The specified level must be equal in each container.

In addition to self-checking, you can use the injector diagnostic service at a car service center. This operation is performed on a special testing stand. Testing an injector on a bench allows you to accurately determine not only the efficiency of fuel supply, but also the shape of the torch during fuel spraying.

How to clean the injectors yourself without removing them from the engine

During the diagnostic process, a common cause of unstable engine operation is that the injection nozzles are clogged. There are several ways to clean injectors, among which mechanical, ultrasonic or cleaning using special chemical compounds can be used.

In some cases, pouring a special injector cleaner additive into the fuel tank is enough to normalize the operation of the entire system. It is also recommended to rev the engine to high speeds at certain intervals and accelerate the car to 110-130 km/h. on flat sections of the path. In this mode you need to drive 10-20 kilometers. Continuous operation of the injectors under load allows for so-called self-cleaning.

Cleaning the injector should be done as a preventive measure, and not after signs of malfunction appear. If the car is operated in city driving mode on fuel of questionable quality, then the interval of preventive measures should be reduced in relation to individual operating conditions.

When and why you need to remove fuel injectors from the engine. Removing injectors on gasoline and diesel engines: features of the dismantling process.

Cleaning a car injector without removing the injectors. Methods for cleaning injectors with removal on a cavitation stand. Ultrasonic and hydrodynamic cavitation.

Malfunctions of diesel injectors, checking and self-identification of problems. Cleaning diesel engine injector nozzles, regulating injection pressure.

Common diesel engine malfunctions and diagnostics of units of this type. Checking the fuel system of a diesel engine, useful tips.

Operating principle and distinctive features of gas injectors. Basic parameters when choosing nozzles for gas equipment 4. Which gas injectors are best to buy.

Features of operation and causes of malfunctions of diesel injectors. How to independently remove, troubleshoot, disassemble and repair diesel engine injectors.

Wiring diagram VAZ 2114 injector: device and features

A car's electrical diagram is the most important document on the basis of which you can understand the malfunction of any electrical part and understand when the wiring is faulty and when the fuses are faulty. If we take as an example the VAZ 2114 diagram on the injector system. Then you can see a typical set of standard devices. A similar electrical circuit is installed on early models of the VAZ 2115 injector.

Components of the electrical circuit

So, in a VAZ 2114 car with an injector system, the electrical wiring, as well as its circuit, consists of 75 structural elements, most of them are fuses. In general, the electrical circuit can be divided into several important blocks. Here they are:

Headlight block VAZ 2114 injector. All electronics related to the operation of the VAZ 2114 lighting system are located here.
Sound signals. The unit responsible for the operation of the horn and other sound signals of this car.
Set of various sensors. This includes all sensors that ensure the normal operation of vehicle components and assemblies - this includes an air sensor, oil pressure, position, and so on.
Circuit breakers. There are also a lot of them in the system. The main task of these electrical parts is to protect the electronic components of the car from voltage surges, that is, as in ordinary household and radio appliances.
Switches for various moving parts of the car, for example, window lifts, etc.
Connecting wires or electrical wiring, its task is to ensure complete communication between all elements, for example, so that fuses are actually connected to the entire system, it is the wires that are responsible.