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.
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.
- 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.
- 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.
- The idle jet or channels are dirty. In such a situation, the fuel lacks air. Clean the jet and the problem will go away.
- Excessive air is sucked in. The mixture becomes leaner, so the engine sputters and stalls.
- The level of gasoline in the float chamber increases or decreases.
- 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 cause of vibration is the air-fuel mixture . which is prepared by the carburetor before being fed into 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.
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:
- The car's power unit stops working as soon as one of the gears is turned off.
- The revolutions begin to “float”.
- When XX is activated, the motor begins to malfunction.
- As soon as the car owner starts the engine when it is cold, it becomes impossible to increase the speed.
- 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.
If the car stalls in neutral...
There are a lot of reasons why a VAZ 2114 with an injector may not work properly when cold. Among them:
- “dying” fuel pump;
- IAC malfunction;
- injector clogging;
- DTOZh malfunction.
IAC (idle air control) is one of the “favorites” of VAZ owners. In addition to stalling, its malfunction is indicated by unstable idle speed. While driving, the car may stall when you switch off the gear or release the gas. The regulator is checked with a multimeter, measuring (with the ignition off) the resistance at the outputs. On pairs of terminals AB, CD there should be ≈ 53 Ohms. There is infinity between AC and BD. If this is not the case, the IAC needs to be cleaned or replaced.
Injector clogging is common due to fuel of questionable quality at half of the country's gas stations. Often the problem is solved by purging with an injector or carburetor cleaner. It's worse if the injectors are clogged. Sometimes it is possible to clean them manually using special chemicals, but more often only ultrasonic cleaning in the service or replacement can help.
The fuel pump does not always “die” immediately. More often than not, problems grow gradually. Listen to its sound when you turn the ignition. If it becomes louder or quieter than usual, this is a signal. Fuel pump malfunctions manifest themselves in different ways, to the point where the car cannot be started. If the car stalls in neutral or when braking, but operates normally in other modes, the fine filter mesh may be clogged.
Ignition. The ignition system on a VAZ does not fail very often, but this option cannot be discarded. The main source of problems is candles. Change them according to the regulations, and there will be no problems. The cause may also be high-voltage wires and the ignition module.
“Armored wires” never fail at the same time. Due to a malfunction of one or even two of them, the machine shakes a lot, but works. But the gradual failure of the ignition coil winding can be the reason that the car immediately stalls, and after starting it will work as if nothing had happened. If this situation repeats periodically without apparent logic, a short-term loss of spark may occur.
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:
- Remove the accelerator cable.
- 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.
- Disconnect the IAC, which is located inside the throttle.
- 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.
- 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, untimely maintenance of the air filter can lead to malfunctions of the throttle valve
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.
HBO for cars
A hot engine can also cause a breakdown in the case of an installed gas system. Since driving on gas has recently become profitable, many drivers switched to this type of fuel, however, they did not take into account some of the nuances of the new system. In hot weather, gas expands more, which leads to increased pressure inside the system and often causes damage. This is why it is bad to drive on gas in the heat.
At high temperatures, seals and hoses can fly off, which leads to gas leakage.
The result is an extremely dangerous situation. To avoid this, try not to fill the tank to full gas in the summer, this will reduce the pressure in the system and the risk of breakdown. If a similar problem occurs, it is recommended to let the car cool down and then visit a service station. You should not repair the gas system yourself; the equipment should be adjusted by a specialist.
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.
Fuel pump strainer is clogged
Considering the quality of fuel supplied to our market, you can often encounter a similar problem. If you have checked everything listed above, but still have not figured out the problem, it is better to immediately go to the nearest auto parts store and purchase a new mesh there. The issue price is about 70 rubles.
Then, under the rear seats, we find the hatch and unscrew it, gaining access to the gas tank. We disconnect all the tubes and remove the fuel pump mount and remove the entire mechanism from the tank. A mesh will be attached to the supply to the fuel pump, remove it and install a new one. Afterwards we collect everything back into the gas tank.
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.
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.
Problems of domestic cars
Many domestically produced cars also have trouble starting when the engine is hot. The problem is in the design, but this time the gas tank. The fuel pump, which heats up during operation, should, in theory, cool down a little during operation. This occurs due to the liquid that moves through its body. During the summer heat, the liquid heats up, so cooling does not occur, which leads to disastrous consequences.
A faulty high-pressure fuel pump (HPF) stops working, which leads to a disruption in the fuel supply to the engine. Subsequent turns of the key and pushes will not help, but there are several “old-fashioned” methods. The device needs to cool down.
- Wet a cloth in cold water and apply it to the fuel pump housing until it cools down.
- Roll the car to a cool, sheltered place from the sun, open the hood. Wait a while for the unit to cool down. This usually takes 15–20 minutes.
An overheated fuel pump breaks down completely and cooling will not help it, so if after some time the car still does not start, you will have to replace the part. If the engine still starts when cold, then the problem is in the turbocharger.
It is recommended to replace the device, otherwise the problem will recur every few days.
A warm engine may not start due to poor quality fuel or the presence of unacceptable additives. This happens after changing the fuel. At the first start, everything may be in order, but then the engine stalls and does not want to start.
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.
VAZ injection engines
In injection engines VAZ-2110, 2112, 2114, 2115, both 8-valve and with a timing belt with 16 valves, it is more difficult to identify the cause of the decrease in power due to the more complex design of the main systems.
Supply system
Any injector consists of a mechanical executive part and an electronic control part, and problems can arise in both of them, which will lead to a drop in power.
Let's look at the mechanical part first. Here, cravings can be influenced by:
- Severely clogged mesh filter on the fuel pump;
- Decrease in fuel pump performance due to wear;
- The fine filter is dirty;
- Malfunction of the fuel rail pressure regulator;
- Clogged injectors;
- Fuel filter dirty;
- Air leak in the manifold.
In general, almost every element of the injector executive part can be the culprit for a decrease in dynamics.
The situation is approximately the same in the electronic component.
The operation of the engine with the injector is controlled by an electronic unit, which constantly monitors the parameters through sensors installed on different systems.
The number of these tracking elements is considerable and the breakdown of any of them leads to the fact that the ECU incorrectly evaluates the indicators on the basis of which it controls the executive part.
Thus, the lambda probe, DPKV, mass air flow sensor, DPZ, phase sensors, detonation sensors and coolant temperature sensors in the event of a breakdown lead to a decrease in power, so you will have to check all of them in search of the cause.
Ignition and exhaust system
As for the ignition system of injection engines VAZ-2110, 2112 and others, the reasons may be:
- Candles;
- High voltage wires;
- Ignition module.
Another possible cause could be a misalignment of the generator drive pulley (with the ring gear).
IMPORTANT TO KNOW: What is an adsorber in a car. Because of this, the DPKV readings are disrupted, as a result the operation of the ignition system is disrupted, which leads to a drop in traction
Because of this, the DPKV readings are disrupted, as a result the operation of the ignition system is disrupted, which leads to a drop in traction.
In injection engines, the exhaust gas removal system more often creates this problem than in a carburetor car, and all due to the use of a catalyst.
The element's honeycombs have a small cross-section, so they become clogged quite quickly, which leads to exhaust gases “crushing” the engine.
Also, if the engine does not pull, check the lambda probe.
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.
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.
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.
What's the result?
Taking into account the above information, it becomes clear that most often the engine stalls when the clutch is depressed due to problems with idle speed. As you know, the IAC and throttle position sensor are responsible for idling.
This means that these elements must be checked first. You can also quickly identify and localize many problems using computer engine diagnostics, which allows you to comprehensively check the operation of the engine and its systems.
Finally, we note that the car can stall even after the LPG installation has been carried out. In this case, it is necessary to contact the installation service so that qualified specialists make all the necessary settings of the gas equipment and the corresponding adjustments to the gas equipment.
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