The operation of the car completely depends on the performance of its components and parts. If one of the elements fails, the car ceases to function normally. With planned maintenance, it is possible to eliminate all impending vehicle breakdowns. However, it also happens that a component breakdown can occur suddenly. It happens that the car starts, then stalls. In many situations, it is not possible to start a vehicle next, and you have to turn to the services of a tow truck. What to do in this case and how to fix the malfunction? Let's consider.
Reasons for the malfunction
If the car starts and stalls, the causes of the malfunction can be varied:
- Long time operation of the car.
- Problems in the electrical circuit of the car.
- Faulty vehicle fuel system.
- Incorrect adjustment of some individual systems.
Stalls idling
The reasons for stopping the power unit at the twentieth may be:
- Malfunction of the regulator XX. You can check the functionality of the XX sensor as follows: try to start the car and press the gas pedal when scrolling through the starter. As soon as the engine starts, you should release the pedal and look at the revs, if they are floating, the problem lies precisely in the XX sensor.
- In other cases, when your VAZ (injector) starts and stalls, the problem lies in the disruption of the throttle. Flush this part.
- Sometimes flushing does not fix the problem. In this case, the reason lies in the throttle position sensor. To solve the problem, you will have to replace the sensor.
Why does the engine stall
Starts up on the go and then immediately stalls, the engine for a number of reasons:
- Poor fuel quality. You can fix the problem by replacing the fuel filter.
- Clogged spark plugs (large soot). Exit - replacing or burning candles.
- Clogged fuel cell. It is worth making a replacement.
- Air filter malfunction. The motor stalls due to insufficient oxygen supply, which leads to weak combustion of the working mixture.
- Generator malfunction or battery landing.
- Failure of the main auto sensors.
The problem with the generator
The main reason why the engine stops working under certain loads is a poorly functioning or not working voltage generator at all.
When
the engine starts, energy is taken from the battery, and if there is sufficient charge on the battery, then it will not be possible to notice the malfunction immediately. But after a little work, the battery will begin to discharge, since it does not receive the proper level of energy. As a result, the engine stops due to the small amount of energy. If the battery was initially weakly charged, it may happen that the injector starts and stalls.
Malfunction features
In the event of a malfunction, characteristic features will occur for the engine:
- The car stalls when you turn on appliances or other equipment that works from the on-board network.
- The BC operation is disturbed due to voltage drops.
- When the load is applied, the engine instantly stops.
- The sounds of the alternator belt scroll are audible.
- If the generator is disrupted, then with an increase in speed, the headlights begin to burn better and brighter.
Sometimes these malfunctions are associated not with the disturbed operation of the generator, but with other problems of the car.
To accurately determine the problem of malfunction, it is better to use the diagnostic center, where, thanks to the use of special equipment, the craftsmen will be able to determine the problem of why the engine starts and stalls. In other cases, the engine stops directly due to problems with other equipment.
Fuel sensor failure
Not the most reliable in operation are gas float sensors. Low reliability is also caused by the poor quality of fuel used, climatic conditions. As a result, due to two unpleasant moments, the sensor fails. If the car owner refills each time for one certain amount of fuel, then the sensor will quickly fail. A broken mechanism will not allow to keep track of the fuel in the tank in time, and if at the last moment there was enough fuel to start the engine, then a stop will follow, since there is not enough fuel and lubricants to operate. In case of problems with the amount of gasoline, as a rule, the engine will not succeed in starting the next time.
Void tank
Sometimes, despite the performance of the fuel sensors, the driver may not keep track of the amount of fuel in the tank.
The first symptoms of a lack of gasoline will be that the car’s engine starts and stalls. In this case, you need to add some fuel and look at the behavior of the car. It is worth remembering that when you try to start the engine without fuel in the fuel tank, the load on the gas pump increases. He heats up and works "dry."
Fuel pump mesh clogged
For cars of the VAZ family with an injector installed, instead of a carburetor, it is characteristic that the car starts and stalls. Sometimes the reasons for an independent stop of the engine lie in the malfunction of the gas pump. If the car stalls immediately after the factory, but then starts, the problem lies in the clogged cleaning grid of the gasoline pump. In this case, it is necessary to replace the grid with a new one and enjoy the further movement of the car.
In other cases, it happens that the car starts beautifully in the cold and does not even stall, but as soon as it warms up or when the temperatures outside are hot, it starts to twitch. What is the problem if the engine starts and stalls in the cold? It is hidden in the performance of the gas pump. Sometimes such symptoms are characteristic of poor fuel quality. This is also caused by a clogged pump screen.
Fuel system malfunction
In addition to the clogged grid, there are other options for malfunctioning the fuel system, which affect the starting and operation of the engine. The driver can fix all of the following problems in the work independently or by contacting a service center:
- The gas pump burned out - the engine started and immediately stalled.
- Injectors clogged, resulting in insufficient fuel and lubricants.
- Fuel pipelines clogged due to low-quality gasoline.
- Failure in the on-board computer, which turned off the fuel pump.
Drivers of constantly serviced cars rarely encounter the listed fuel system malfunctions. If the car starts poorly and stalls, then the problem should be diagnosed by checking the fuel system.
Valve malfunctioning
When the engine starts and stalls, the cause of the failure is hidden in the operation of the valves (this applies to the gasoline model of the engine). For diesel options, a decrease in fuel pressure is characteristic. For repairs, you should contact the service station, where they will carry out the appropriate diagnostics and adjust the valves and adjust the timing.
Problems can most often be as follows:
- Unadjusted valves and uneven clearances do not allow the engine to operate stably.
- Valve deformation. Replacement will be required, followed by tuning the timing.
- Subcooling of the power plant, which prevents normal warm-up at startup.
- Frozen diesel in the tubes.
With the car, each of the listed failures can occur, and the question can be solved only thanks to the corresponding masters. When the driver has the skill to set the timing, you can do the repair yourself. If malfunctions are observed in the winter, it is necessary to put the car in a warm box for some time, if possible, and the problem of starting / stopping the engine may disappear on its own.
Carb problem
There is a situation when the car warms up well, but the engine stops on its own. Most likely, these are carburetor malfunctions. This is due to the fact that during its operation a large amount of air passes through this device, part of which allows cooling in a timely manner. Together with the carburetor, fuel is cooled, which passes through the device. As a result, it turns out that the temperature of the carburetor is much lower than the temperature of the engine.
When a scheduled engine shutdown occurs, heat begins to flow into the carburetor from the motor housing. Inside the camera floats, a reaction begins to occur, in which the remaining gasoline evaporates. The evaporated parts begin to move freely and fill the carburetor, as a result of which air plugs begin to appear in some places, and there is no fuel in the float chamber.
To solve this problem, you need to press the gas pedal several times (it should only be squeezed out for half a stroke). After that, start the engine. As a result of the measures taken, the air congestion will be removed, and the problem when the engine starts and stalls will be exhausted. It is worth remembering that in addition to the carburetor, the problem can be manifested on the
fuel pump or fuel lines. This phenomenon is observed at abnormally hot temperatures, when plugs appear in the system and pump, which leads to poor access of fuel to the carburetor. With regular use of the vehicle, it is recommended that you periodically clean this unit with special solvents.
Conclusion
High-quality equipment is famous for the duration of its work and high reliability, however, problems arise during the operation of any installations. The situation when the engine starts and stalls can catch absolutely any driver. Often this problem occurs with owners of budget brands. However, even cheap cars do not have such problems (with timely maintenance). And since trouble always takes you by surprise, it is better to carry out all the necessary measures prescribed by MOT. So, we found out why the engine starts and stalls. As you can see, the problem can be solved independently, saving money on the services of service stations.