VAZ-2114 cars, from the start of production, are equipped with eight-valve engines with a volume of 1.5 liters. Since 2007, they have been equipped with an eight-valve 1.6 liter engine with an environmental class of Euro-4. The operation of the car, sometimes incorrectly, brings “surprises” over time. The engine does not perform its functions at full power, and thrust decreases. Let's try to understand the causes and methods of elimination.
Troubleshooting options
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 malfunction
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.
Filter 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.
If the diesel engine doesn't work
A decrease in traction can also occur in diesel engines. If we look at old cars that have completely mechanical power systems, then the most common cause is depressurization of the system.
As a result, air enters the fuel, which is why the fuel injection pump is unable to provide the required pressure.
Don't forget about:
- clogged filters;
- weakly pumping fuel priming pump;
- damaged plunger pair;
- Coking of injector nozzles.
And if we also add possible problems with the timing belt and CPG, then identifying the cause will not be so easy.
In modern diesel installations, where an additional electronic component is used, the search range will increase.
For example, the Common Rail system uses all the same sensors as the injection engine. And if at least one of them breaks, this will certainly affect the operation of the control part.
How to Avoid Failures
Having talked about how to eliminate gas pedal failures that occur on a car, it is worth talking about how to completely avoid their occurrence. So, the most common cause of their occurrence is wear of the spark plugs. Therefore, you should always check their condition, prevent clogging and oxidation, and, if necessary, replace them.
In addition to spark plugs, high-voltage wires should also be periodically monitored (despite the fact that they have a long service life, core breaks and breakdowns of protection are far from uncommon).
Another very common cause is clogged filters, and especially the air filter. This element is a direct participant in the chain of formation of the working mixture, and that is why its contamination (or even damage) can immediately affect the operation of the engine.
The last thing you should pay attention to in order to avoid unpleasant gas failures is the quality of the fuel. If you notice that at the nearest gas station it has dropped significantly (and the car reacts to this), then you should not continue to use it - it is better to try to refuel at a pump of another company (or several companies)
In this way, you can find the highest quality gas station and ensure reliable operation of your car’s engine.
Failure when pressing the gas pedal or accelerator pedal is a problem that is rare in modern cars, but a common occurrence in VAZ cars. The problem is that pressing the pedal has no effect. And after a few seconds there is a jerk, the car jerks. A serviceable engine responds quickly to pressing the gas pedal.
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