VAZ 2114 (injector) stalls at idle - TOP 6 reasons and solutions

Owners of domestic cars often complain that the VAZ 2114 stalls at idle (injector). The problem does not appear immediately; often even the engine gives signals to the owner, for example:

• Noticeable increase in fuel consumption;
• At low speeds the car jerks;
• The engine speed fluctuates noticeably.

If you don't pay attention to this, you can end up with a lot of problems in the future. Let's look at the reasons for the drop in idle speed.

Regulator XX

This is one of the fairly common reasons why the VAZ 2114 injector stalls at idle. Regulators called XX or IXX are special devices that help control engine speed at idle. For the power unit to function properly, some air must pass inside. It, in turn, is detected by the mass air flow sensor, and the fuel controller supplies fuel based on sensor readings. Also, the number of revolutions is controlled by the DPKV. But it is the XX regulator that is responsible for the air supply, regardless of the operation of the air valve.

If an IAC system is installed in the car, then, as a rule, the car owner does not need to warm up the engine for a long time before starting to drive. However, this type of regulator is not capable of self-diagnosis. Therefore, if it fails, the VDO VAZ 2114 dashboard does not notify the driver that this unit needs to be checked.

The car stalls due to sensors

The correct operation of the VAZ 2114 injector depends on several sensors:

• TPS (throttle position sensor);
• MAF (mass air flow sensor);
• DPKV (crankshaft position sensor);
• DTOZH (coolant temperature sensor).

If stalling of the car consistently depends on temperature (usually on a hot engine), the cause may be DTOZH . When cold, an enriched mixture is supplied to the injector. If, as the sensor warms up, it does not provide the correct data to the computer, the engine may become dull and stall.

The mass air flow sensor does not often manifest itself by stalling the car. Its “element”: failures when pressing the gas, increased fuel consumption, drop in power. But the VAZ 2114 may stall when pressing or releasing the gas if there are strong deviations in the real and measured amount of air. When you press the gas, the actual air flow increases. If the sensor gives the computer approximately the same readings as at idle, the mixture becomes very lean and the car may stall.

Mass air flow sensor VAZ 2114

Most often, the matter is solved by cleaning the mass air flow sensor. You can check it by disconnecting the chip while the engine is running. If the sound of the motor does not change, the source of the malfunction has been found.

TPS regulates the amount of fuel entering the engine. Contamination does not affect it as much as the mass air flow sensor, although sticking of moving parts is possible. Its main enemy is mechanical wear, which can only be corrected by replacement.

If the TPS is faulty, the car usually stalls when changing gears. This can happen when the gas is released or the engine speed drops, if the supply of the fuel mixture is momentarily blocked by the damper.

Throttle position sensor VAZ 2114

As a rule, TPS problems are not solved by cleaning. The sensor is checked with a multimeter. It is better to perform the operation together. Select the multimeter mode on the tester and set the probes to ground and the input signal - it should constantly show 5V. Then place the second probe on the third output (signal in the controller line). Have an assistant step on the gas. The voltmeter readings should vary within the range of ≈ 0.5 – 4 V. If there is no 5V power supply, the problem is electrical. If the sensor does not respond to pressing the gas or reacts incorrectly, replace the TPS.

DPKV is one of the rare reasons why a VAZ 2114 car stalls. There are several “old-fashioned” (inaccurate, so we don’t list them here) ways to check it. Ideally, the performance of the DPKV is checked with an oscilloscope, so we recommend that you always keep a spare sensor in the glove compartment. If other options have been exhausted, replace the DPKV with a known working one.

If the DPKV is faulty, the ignition does not work correctly: the injection phases are confused, the operation of the injectors and spark plugs does not match. The car may not start (most often) or start extremely poorly, stall and immediately stall, or run on gas on two cylinders.

The worst case scenario for why the car stalls when you let off the gas or at idle is that the cylinder head gasket is broken or the head is misaligned. In this case, engine repair will be required. There are so many reasons for such a malfunction, and the symptoms are so similar that diagnosis is mandatory. But even this does not always give results, pointing to the symptoms and not the causes of the car’s “disease”. Replacing the sensor may help, but after a while the problem will return.

You need to check each element one by one: starting with simple options and ending with complex ones (electrical breaks, uneven engine compression and its causes).

Self-diagnosis of ICC

To understand that this particular unit is the cause of a stalled engine, it is enough to pay attention to several signs:

1. The car's power unit stops working as soon as one of the gears is turned off.
2. The revolutions begin to “float”.
3. When XX is activated, the motor begins to malfunction.
4. As soon as the car owner starts the engine when it is cold, it becomes impossible to increase the speed.
5. When the driver turns on the headlights or other light optics, the engine speed begins to drop noticeably.

How to fix the situation

There are several manipulations that will help solve the problem that the VAZ 2114 injector stalls at idle if the IAC is the cause. First of all, you need to disconnect the control unit from the power supply and disconnect the terminal. After this, you need to pay attention to the distance between the flange needles (or rather, their ends) and the regulator. There should be about 2.3 mm between them.

In the next step, the battery terminals are put back into place. After this, you need to turn on the motor for 10 seconds. In this case, automatic calibration of the IAC should occur. If everything is in order, then after this the engine will start normally.

However, this is not the only reason that the VAZ 2114 starts up when cold and stalls almost immediately, or speed jumps occur.

Floating speed on the carburetor

On carburetor versions of the VAZ 2114 there is no electronic control unit as such. But this does not mean at all that the problem of floating speed is not alien to him.

Tachometer with high speed

Floating speeds do not occur as often as in the case of an injector, but still. The reasons, as well as troubleshooting methods, vary.

1. The idle speed is set incorrectly, or it got lost during operation. In such a situation, the setting shifts to combining the fuel-air mixture. Here you will need to adjust the speed to the range of 800-900 units.
2. The solenoid valve is faulty. The engine will only run if the choke is pulled out. If you remove it, the engine will immediately stall.
3. The idle jet or channels are dirty. In such a situation, the fuel lacks air. Clean the jet and the problem will go away.
4. Excessive air is sucked in. The mixture becomes leaner, so the engine sputters and stalls.
5. The level of gasoline in the float chamber increases or decreases.
6. The air filter is clogged. The problem is solved by simply replacing the element.

If engine vibration occurs at idle speed of the VAZ 2114, there is no need to worry. It's all about the design of the engine. A similar phenomenon is typical for carburetor engines during cold starts. The engine just needs to warm up to the optimal temperature, after which the vibrations disappear.

The reason for the vibrations is the air-fuel mixture that the carburetor prepares before entering the combustion chamber. Low temperatures lead to inefficient combustion of the mixture. Hence the “shaking”.

Although it is not uncommon for vibrations to occur due to the cushions, that is, the engine mounts on which it is mounted. When they wear out, vibrations are possible. Moreover, this does not depend on what type of engine is used - injection or carburetor.

You should always pay attention to the floating speed of the VAZ 2114 and not wait for the problem to manifest itself in some other way. If you delay in identifying the causes and eliminating faults, repairs can be much more expensive.

Cleaning the throttle body

First you need to disconnect the clamps that secure the hoses going to the remote control. You will also need to remove the pads from several sensors, or rather, the IAC (if any) and the TPS. After this you need:

1. Remove the accelerator cable.
2. Remove the throttle assembly itself and assess its condition visually. Such self-diagnosis will help you understand whether the VAZ 2114 injector really stalls at idle due to remote control.
3. Disconnect the IAC, which is located inside the throttle.
4. Assess whether there is accumulated carbon deposits under the sensor. If it is not in the chamber itself, this does not mean that it is also clean under the regulator. As a rule, all cars with decent mileage accumulate a lot of carbon deposits.
5. Clean the IAC needle using a specialized aerosol. You need to process all parts very carefully, and then wipe them dry with a clean cloth. You must act with extreme caution so as not to damage anything. Therefore, it is better if you have a compressor at hand.

If the Lada Samara has low mileage or the sensor has recently been cleaned, then problems may lie in other parts.

OPTIONS FOR TROUBLESHOOTING

It is clear that if any emergency situations arise with the motor, it is advisable to contact a specialized service. However, this procedure is not always possible. Therefore, it is worth knowing how to independently diagnose the main systems and key parts.

THROTTLE VALVE AND ASSEMBLY

When the speed drops at idle and the car stalls, you need to pay close attention to the details of the throttle assembly. Long-term operation of the car on low-quality fuel and untimely maintenance of the air filter can lead to malfunctions of the throttle valve. It periodically jams if debris gets into the equipment

It periodically jams if debris gets into the equipment.

Throttle valve VAZ 2112

The problem can be solved by cleaning the system. The throttle is cleaned using carburetor cleaners. Using a compressor, you need to blow out the damper under the pressure of compressed air. It is not recommended to touch the screws located inside and on the side. If cleaning does not correct the situation, the device must be replaced. This operation is not particularly difficult.

CRANKCASE FAILURE

There is an oil trap in the crankcase ventilation system of the engine. Its contamination can also lead to interruptions in engine operation. Crankcase gases do not allow the engine to function normally, the speed fluctuates, the internal combustion engine stalls.

SENSORS

If a gasoline car stalls at idle, then one of the sensors is likely to break. In injection cars with an electronic engine control system, the engine usually starts normally, but then it stops working. It's worth checking here:

• Electronic car indicators;
• DRХХ – device that regulates idle speed;
• Air flow meter (air intake in the carburetor);
• Sensor indicating the position of the throttle curtain.

Electronic control unit in VAZ 2114

Interruptions in the operation of any sensors immediately affect the behavior of the electronics - errors appear in the car control unit. The “brains” of the machine receive unreliable information. It is not transmitted correctly to the engine. It starts working with parameters that do not correspond to reality. Self-testing of this device is not possible. You need to contact a professional for service.

Diagnostics of mass air flow sensor

The idle air control device is usually to blame for engine malfunction when the car idles poorly. But you pressed the gas pedal and the engine started. In the latest VAZ modifications, error information appears on the instrument panel.

When diagnosing, you must use a multimeter. If a part is faulty, it is recommended to replace it with a new one. All sensors are reasonably priced. It is better to start checking with parts that have a simpler design. Then gradually move on to complex devices. We must not forget that the problem may lie not only in the sensors themselves. It is also necessary to check the wiring to them and the presence of stable contact.

CARBURETOR

If the VAZ carburetor stalls at idle speed, then the jets may become clogged. Low-quality gasoline, deposits from the gas tank, contain small particles of debris. They can easily disrupt the operation of the fuel injection system. It is worth replacing the filter in front of the carburetor and cleaning the device itself. The dispensing part is cleaned using a cleaning solvent, which is sold in aerosol cans. Another reason is often a prolonged lack of carburetor adjustment.

In a mechanical fuel pump of carburetor cars, the filter mesh may be clogged with dirt. This reduces the performance of the device. Wear of the membrane and its destruction often leads to clogged carburetor channels.

INJECTOR

A situation that often arises is that various Lada models, as well as the VAZ 2110 injector stalls at idle. It is necessary to check the fuel pump strainer for clogging. This is a common problem with injection machines. It is better to immediately replace the part with a working one.

FILTERS PROBLEM

If the VAZ 2112 stalls at idle, then the fuel filter may be dirty. This also applies to other models of the concern. Generally, it is not practical to clean it. The part must be replaced. The same should be done with a dirty air filter. Low throughput leads to the fact that the air-fuel mixture simply floods the spark plugs.

Self-checking will not always lead to a positive result. It is often more practical to identify the cause of unstable operation of the internal combustion engine at a car service center. It will cost more, but specialized diagnostics will prevent more serious damage to the car.

Air filter

If all the reasons described above do not apply, then you should pay attention to the filtration system. This unit also often leads to malfunctions.

On injection-type cars, filters are adjusted to an optimal and universal operating mode. This element is necessary in order to trap dust and dirt, but not impede the passage of clean air. Typically, small panel filters are installed in VAZs. They are considered more efficient and compact. However, cylindrical models are often installed in cars, which quite quickly cease to perform the task correctly. In this case, you will need a simple diagnosis of the VAZ 2114 car and replacement of the damaged element.

Repair

For self-diagnosis and repair, the air filter must be removed. It is not so difficult to do this on injection-type cars. To do this, you need to open the hood of the Lada Samara and disconnect the DRV.

After this, all that remains is to find the screws (usually there are four of them) that secure the filter and remove them using a shaped screwdriver. After this, you can easily remove the filter. At the next stage, all that remains is to assess how dirty it is and, if necessary, replace this element.

Fuel filter

This element acts as a fuel purifier that enters the engine. If the fuel mixture contains a large amount of dirt, various impurities and particles that should not enter the power unit, this can cause many problems.

If the fuel channel begins to become clogged, the XX sensor will not be able to work correctly. Therefore, this will lead to the VAZ 2114 injector stalling when cold. If the problem is not corrected, the situation may only get worse.

Sensor malfunction

The normal functioning of the injection engine on the VAZ 2114 is ensured by the correct operation of four key sensors: throttle position, mass air flow, crankshaft position and coolant temperature.

The first of them - TPS - is responsible for the amount of gasoline supplied to the engine from the gas tank, and in some cases it can become clogged to the extent that the performance of its moving parts deteriorates. This breakdown is characterized by the engine stalling when changing gears - both when the gas is released and when the engine speed is reduced, if the damper does not open or close in time.

A faulty mass air flow sensor is more likely to lead to sharp drops in power and increased gas mileage, rather than to a stalled engine if it transmits incorrect incoming air readings to the ECU. This, in turn, leads to a leaner mixture supplied to the cylinders, which sometimes causes a drop in speed.

As for the DTOZH, when it fails, usually the car stalls already on a warm engine due to distorted information from the sensor, while a faulty DPKV is a very rare situation in which the fuel injection phases are disrupted and the engine begins to throttle severely.

Post edited by krest: 03/01/2010 - 12:24

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Post edited by Cerberus: 03/02/2010 - 12:04

Replacing the fuel filter yourself

Before performing work, it is necessary to drive the car onto an overpass or pit. After this, you need to find the necessary filter. In this car model, it is located under the bottom of the vehicle behind the fuel tank, next to the muffler. After this, you should unscrew several fittings (pipes). It is best to do this using key number 19 M.

If everything is done correctly, the filter can be easily removed. You just need to remember which side it was installed on. After this, it is enough to put the new filter in the same place in the correct position.

If the VAZ 2114 stalls, there may be other reasons. Therefore, it is worth considering them in more detail.

VAZ 2114 injector stalls at idle: what to do

Many owners of “fourteeners” are faced with a problem when, after 3-5 minutes of warming up a cold car, the VAZ 2114 stalls, then starts, but at 1-2 speeds the speed jumps strongly, which is why the car starts to twitch.

Subsequent “symptoms” may vary, so the car may work well in higher gears or stall in them, the check may be on or not, but all these problems belong to the same group and are associated with unstable engine operation. Therefore, below we will talk about possible causes and methods of diagnosing them.

Injection system

If you contact a specialized service center, specialists will definitely check this unit for serviceability. Therefore, when self-diagnosis, this is also taken into account. Often errors in the operation of the power unit are associated with hydraulics. Some of its parts may work correctly, but if the so-called coking of the injectors occurs, then problems cannot be avoided. As a rule, the cause of this phenomenon is low quality fuel. If it contains impurities that cannot dissolve, then all these particles begin to settle on the injection elements. In the first few minutes of engine operation, this problem becomes most obvious.

Spark plug

The car stalls while driving due to spark plugs: clogged contacts, plaque formation, incorrect voltage supply.

If a black coating appears on the spark plugs, a normal spark will not be able to form. The presence of dirt on the contacts indicates low quality fuel. The contamination is caused by a defect in the oil supply system.

A black coating appears on the candles

Oil on the spark plugs is a sign of failure. The car must be sent for diagnostics. Ignoring a problem can lead to costly repairs.

Attention! When the spark plugs fail, the engine runs unevenly, the car jerks when driving, periodically stalls, and is difficult to start. If there is a red-brown coating on the contacts, low-quality fuel is poured into the tank. In this case, the spark plugs need to be replaced.

Other reasons

First of all, you need to understand that a lot depends on how cold it is outside. If there is severe frost, it is not surprising that an unheated engine will malfunction. Therefore, you have to constantly keep your foot on the gas pedal.

Sometimes the problems are related to the spark plugs. Therefore, it is recommended to check them. You need to understand that these elements do not have a long service life. Therefore, if the car has quite an impressive mileage, then perhaps it is the spark plugs that have become unusable. Soot may settle on them. This often leads to irreversible damage to the elements.

If problems arise specifically with the spark plugs, then you need to find the damaged one and replace it. To do this, it is not necessary to seek help from a specialized center. All necessary work can be done independently.

Problems with engine activation can also arise due to problems in the ECU. It is also worth checking the quality of all connections. There is a risk that the wiring of the VAZ 2114 injector has been damaged. Therefore, it is worth making sure that it is in good working order.

It is also recommended to pay attention to the vehicle's exhaust gas recirculation valve. In this case, a cold engine will stall. To correct the situation, it is enough to replace the faulty unit.

Why does the VAZ 2107 jerk?

When the driver discovers that the VAZ 2107 car is twitching, first of all there is a feeling of wariness and, of course, this is terribly annoying.

Usually, a visual inspection of the engine does not bring any results. To identify the cause, it is necessary to determine under what conditions the car jerks.

The most common options are:

• the car starts to jerk and stalls when accelerating;
• the car jerks when you press the clutch pedal;
• during braking;
• at speed with the accelerometer pedal pressed.

If the VAZ 2107 car jerks periodically in the 2nd and 3rd cases, then you need to pay attention to the operation of the clutch and its condition. Other cases may be harbingers of a wide variety of malfunctions

Main reasons

Most often, the VAZ 2107 jerks due to low-quality gasoline. If fuel was poured into an almost empty tank, the first jerks will begin almost immediately. If there was already a certain amount of gasoline, then the car will be able to drive relatively calmly for some distance.

Also a sign of poor fuel quality is the black color of the exhaust when driving. The engine loses power, but the car continues to drive. There is a small chance that when driving, all the low-quality gasoline will be used up. Alternatively, you can dilute it with a better one, for example, at the nearest gas station.

Another reason that explains jerks in the movement of the VAZ 2107 is condensation that forms in the fuel tank. Since water and gasoline have different densities, they separate. The moment water enters the carburetor, a jerk occurs. More specifically, the injector supplies water to one cylinder and gasoline to the other three.

Another reason why the VAZ 2107 car jerks may be in the fuel filter. If the replacement is not carried out in a timely manner, then even at low speeds the car may move jerkily. The fuel pump generates pressure, which, if the fuel is of poor quality, creates voids and when accelerating, or while driving at speed, the car jerks.

If there is water in the fuel, the filter cleaning sheets swell, which prevents the normal supply of gasoline to the carburetor. A phenomenon called a “vapor lock” may also form, which blocks the operation of the fuel pump. Conditions for appearance:

• the engine is at an excessively high temperature;
• in hot weather;
• at low speeds.

Because of this plug, the required amount of fuel does not reach the injector, and the engine stalls. This can happen when driving at low speeds, as well as when starting from a stop. The fastest, easiest and most effective way to get rid of this problem is to apply a rag with cold water to the gas pump.

If the car jerks during acceleration, then most likely it is the carburetor, or more precisely, the problem is in the idle air valve and jets that are clogged. The reason why the VAZ 2107 jerks when driving can even be a small bubble in the hose, due to which excess air enters the carburetor from the cracks. All hoses should be checked for cracks or cuts.

If the injector and fuel are in order, and the jerking does not disappear when driving and starting, then you can check the distributor. To do this, you need to remove it and carefully inspect the contacts. They are responsible for the distribution of impulse for each candle. If ignition does not occur in one or more cylinders, the VAZ 2107 engine begins to triple and double when moving.

If everything is in order with the distributor, then you need to check the wires going to the spark plugs. It happens that the insulation is broken, which leads to “breaking through”. The next step is to inspect the ignition coil. Faults in this element or outgoing wiring can also lead to jerking when starting off or driving the VAZ 2107.

Usually, spark plugs fail very quickly, but in some cases, before this they can produce a spark in a random order, which, in turn, causes jerking, and the VAZ 2107 simply stalls. If the VAZ 2107 car jerks, then first of all you need to check the quality of the fuel supplied to the injector. Then you can check the remaining elements.

Diagnostic features

It is worth considering that there are no exact sequential actions by performing which it will be possible to accurately determine the cause of the malfunction. If the power unit stalls only occasionally, then the situation may not be that serious. There is a chance that this is how the vehicle simply reacts to severe frosts. However, if you have recurring problems, you should contact a specialist.

It is best if the mechanic connects a specialized diagnostic device to the car at a car service center. He will determine exactly where the breakdown occurred and which element should be replaced. Of course, if the car owner has enough knowledge, he can identify the problem on his own. But you need to understand that if such a diagnosis was performed incorrectly, this can lead to more serious consequences. In this case, the final repair of the car will be much more expensive. Therefore, you should think several times before saving.

The “fourteenth” model from the domestic automaker AvtoVAZ gained enormous popularity in its time due to its reliability, workmanship, responsiveness and agility of the power unit.

Of course, this car cannot be called ideal. Therefore, problems may arise from time to time. It is not uncommon for the rpm to fluctuate at idle. Such phenomena irritate the driver and lead to unpleasant scenarios on the road. For example, at any moment the engine may simply stall.

It is unlikely that you will be able to solve the problem for a long time by pressing the accelerator pedal in order to maintain speed. Therefore, more drastic actions need to be taken.

Fuel quality

One of the reasons is low quality gasoline, which does not meet the octane requirements for the car. The driver needs to remember where and what kind of gasoline the vehicle was last filled with. If it is indicated that the motor should run on AI-95 or AI-98, pouring AI-92 into the tank is dangerous.

The problem is caused by fuel - when you press the gas pedal fully, the speed does not pick up, and when the clutch is depressed, the power unit stalls. The situation is explained by the weak spark produced by poor fuel.

To fix the problem you need to:

1. Drain fuel.
2. Wash the motor.
3. Clean all fuel system pipes.
4. Change the fuel filter.

Car engines are sensitive to fuel quality.

How does this happen

If the car is running normally, all you need to do is start it and wait until the engine warms up to the optimal temperature. The tachometer indicator at this moment is at 2-2.5 thousand rpm, and then gradually drops to about 800 rpm as the power unit warms up.

But when there are problems, the idle speed jumps and changes sharply. The range of revolutions difference on the tachometer can be significant, up to 1.5 thousand revolutions. The car seems to live its own life. After some time, this phenomenon stops. But the next time the ignition is turned on, everything repeats.

We diagnose by eye and ear

The quality of such diagnostics greatly depends on the experience of the car enthusiast; a Soviet school driver simply learns more about the car by sound than some specialists can by conducting computer diagnostics. Even if you are not a professional, you need to find the answer to just one question - when does the car stall?

The options may be as follows:

• at idle – there can be a lot of reasons, so it’s worth using a comprehensive check, starting with operational reasons and ending with the more serious ones described above;
• it stalls when cold, but works well when hot - in this case it’s worth checking the TPS;
• stalls after warming up - usually the cause is problems with engine maintenance, this creates problems with enriching the mixture at high speeds;
• It always stalls, but only works when the pedal is pressed - this is a breakdown of the DPKV. Characteristic symptoms are tripling, operation on two cylinders and inadequate knocking of valves audible even by ear;
• the engine stops working when braking or releasing the gas pedal - most likely the problems lie in a breakdown of the TPS, which disrupts the algorithms for supplying fuel to the engine when the speed decreases sharply;
• it starts and runs at idle, but stalls when the gas pedal is pressed to the floor - this is a characteristic feature of a MAF failure, the fact is that a broken sensor forces the same amount of air at high speeds as at idle.

By choosing your option, and then reviewing the list of reasons again, you can easily, if you don’t name the exact reason, then shorten the search list.

Causes

The most dangerous thing in this case is inaction. Today we will talk about why the idle speed on the VAZ 2114 jumps, what are the reasons and what actions should be taken in this or that situation.

In fact, the reasons can be very different, so we will try to comprehensively study this issue.

Electronic control unit

It is not uncommon that the electronic brains of the VAZ 2114 car become the source of all problems associated with idle floating speed. If a sensor fails, this affects the ECU receiving incorrect information. Consequently, the engine does not operate at the parameters it needs.

Cleanliness of the damper assembly

The throttle valve assembly is diagnosed by visual inspection for contamination. Clean the part with cotton swabs and a toothbrush moistened with a cleaning solution. For ease of work, the device is dismantled. After cleaning, it is recommended to blow out all channels and pipes of the unit with compressed air using a tire inflator.

To clean the part, it must be dismantled

Attention! It is recommended that the channel responsible for removing gases from the crankcase be completely filled with a cleaning solution before purging - the diameter of the element is very small and there is no other way to access it

Video: How to clean the throttle body

Is it possible to diagnose DPKV and DSA?

A breakdown of the DPKV and DSA (Hall sensor) is indicated by the Check Engine indicator that lights up on the car’s dashboard. Testing these devices is only possible using special instruments (oscilloscopes). You can first check the integrity of the wiring; if it is broken, the damage should be repaired.

1. The DPKV sensor is installed on a bracket located in close proximity to the generator drive pulley.
2. The DSA is located on the speedometer drive mechanism of the gearbox.

For a more detailed introduction to methods for detecting faults associated with engine malfunction in idle mode, it is recommended to watch the following video.

Video: Computer diagnostics of VAZ 2114 idle problems

So, the main steps to rid the car of floating engine speed at idle are considered. Remember: if performing these operations yourself does not lead to a positive result, you will have to contact a service station with the necessary diagnostic equipment and qualified repairmen.

Sources

• vazzz.ru/vaz-2114-na-goryachuyu-plavayut-oboroty/
• vazgarage.ru/vaz2115/dvigatel2115/899-plavayut-oboroty-holostogo-hoda-vaz-2114-inzhektor.html
• zen.yandex.ru/media/id/5dc241c434808200b20fb268/plavaiut-oboroty-v-dvigateleustali-ot-problemy-poprobuite-moi-sovetv-svoe-vremia-on-mne-pomog-na-vaz2115-5e184d5f433ecc00ae3ff1f6
• drive2.ru/l/5125037/
• ladaautos.ru/vaz-2115/pochemu-plavayut-oboroty-na-vaz-2115-inzhektor.html