Why stop the car then start? The reasons, Troubleshooting

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2018-03-18 20:20:13

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It Happens that motorists are faced with the problem, when the engine of their car without any cause stalls directly during movement. The reason for this phenomenon can be several factors. In order to further minimize the risk to be in such a situation, in this article detailed discussion of the problem of motor systems and their solutions.

The Engine stalls: causes

As already noted, there may be more than enough. If to consider in order to determine some of the most common.

stalling the car on the move then it starts

  • Low quality Fuel or none at all. As a rule, if informed of problems with the motor not happened, the drivers first think about the fuel. In that case, if the fuel tank has to solve this issue you need the following: replace fuel and fuel filter.
  • Defective or end-of-life spark plugs. The car jerks and stalls on the move, the engine detonates and bad runs. The problem is eliminated by checking the candles, and, if necessary, full replacement.
  • Condition of the fuel filter. If it for a long time was varied, or when using low-quality fuel is heavily soiled and has low throughput. This may cause interruptions in the supply of fuel to facilitate engine shutdown. This fault is eliminated by replacing the filter element.
  • Filter the air. Blockage it leads to insufficient supply of air for the formation of high-quality fuel-air mixture. Without optimal amounts of oxygen the combustion process in the cylinders deteriorates, and the engine simply "chokes". Usually, with this kind of fault motor stalling mostly at idle. Therefore, it is necessary to replace the air filter - and the cause is resolved.
  • Pumping the fuel pump. If this happens, fluid from the tank is not supplied to the engine. It happens that the pump operates with periodic interruptions, that's why the car would start and then stall either immediately or after some time. When the pump does not pump at all – the engine cannot start. In that case, if the reason the pump should be repaired or replaced.
  • Rechargeable battery. The presence of impurities and oxidation of the pin terminals can also be the reason why deaf machine on the go. The power loss in the engine system can cause it to stop. It is important to keep the battery terminals clean.
  • A generator Fault. In case of failure of the generator of the vehicle electronic system starting to eat exclusively from the battery, which leads to its rapid discharge. In result stalls the car on the move, then it starts after a certain time when the battery partially recovers its charge. Usually, this can be repeated several times until the battery completely runs out. When such breakage of the generator it is necessary to diagnose and repair.
  • The failure of additional sensors and control systems of the engine. In that case, if the above-mentioned components and systems are not related to the health of the motor, damage can come from different sensors. Mainly those established on more modern cars. If you determine what is defective or malfunctions, it is not possible at home, you need to use the services of a specialist.

The Engine stops when switching to “neutral”

Causes the engine stalls at idle can be identical to those as when the vehicle is in motion. But there are peculiar only to the work of the engine idling.

the car stalls on the go causes

Frequently encountered problem – it is a violation of the condition of the idle sensor that is directly related to the action of the power unit in this mode. To independently verify the sensor state as follows. If at the time of starting the motor will not start, takes a few times to swing a gas pedal. When the unit start, you should remove your foot from the pedal and control the engine speed. If they are unstable and chaotic "float", the probability that the problem lies in the sensor is very large. To solve this type of fault by washing the sensor with ordinary WD-40, or install a new one.

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The second reason can be attributed to clogging of the throttle, you just need to rinse.

Particular attention should be paid and the position sensor the throttle. It can also help to ensure that deaf machine on the go, then it starts.

To Carry out correcting this failure is quite simple, just replace the sensor, which can be done independently.

Weather conditions

The reason of unstable work of the engine at idle also includes weather conditions. Very often the power unit stalls when trying to warm car in the cold, which greatly complicates the execution of the process.

So, for example, the machine is on gas and stalling at idle because of peremerzaniya gas in the gearbox. This happens when you warm up the engine on gasoline but on gas. Pressure reducer equipped with heating and is connected to the cooling system. As the unit is still cold and coming into the reducer gas tends to cool off when the pressure changes, the icing and clogging of elements of the pipeline and parts of the gearbox. This factor does not allow the engine to idle steadily and without stopping.

why the car would start and then stall

To prevent freezing and trouble-free warm-up the engine must be warm gasoline to raise the temperature of the coolant. Craftsmen have adapted before starting the motor to warm up the gas reducer hot water from the kettle. This prevents premature freezing of the elements of the gas equipment until the engine is already warmed up.

Problem in the carburetor of a car

Sometimes, the engine starts easily and some time is stable in all modes, but after some time stops. Incorrectly adjusted actuator of carb leads to an increase in the number of incoming fuel. Therefore, stalls the car, then start. The carburetor feeds the combustion chamber is too rich, which is non-flammable.

Excess of fuel level in the carburetor float chamber can also affect the operation of the motor. This is mainly disajustment of level of fuel, the needle valve blockage or wear. When repairing a carburetor is not recommended to replace only some of its elements, and fully install the new repair kit with subsequent adjustment of the carburetor.

There is another reason why stall the car (VAZ) – this state of the electromagnetic valve of the carburettor. To test the suitability is quite simple: you must turn on the ignition, then remove the terminal from the valve and connect it back. If the valve is OK, when I connect the terminals, you will hear a click in the valve body. When the click is not forthcoming, try setting on the carb the other valve.

Injection engine

If the car stalls at idle, the injector can also be the cause of failure. Often this is facilitated by disruption of the normal fuel mixture, the violation of vacuum and air leak in the intake manifold after the sensor of air consumption.

why stop a car idling

Change the optimal position of the throttle and a faulty oxygen sensor. Clogged fuel injectors and insufficient pressure of the supplied fuel, and a malfunction of the fuel pump, clogged fuel filter, broken pressure regulator can influence the fact that the car dies on the move. The causes can hide in the engine cooling system, and more specifically, in the thermostat. If it is faulty, it is possible to an insufficient warming-up the engine to operating temperature. However, this applies to all engines. Defective temperature sensor coolant can incorrectly inform the onboard computer on the temperature state of the coolant and to break the normal operation of the power unit.

The power management systems

There is a probability that the engine stops due to a failure in the electronic control unit. Incorrect installation of programs or a failure in the process of operation causes problems in various engine control systems. This problem may occur with a certain frequency or when changing operating modes while driving. That's why deaf machine on the go even with healthy mechanics.

The Catalyst

Clogged and faulty catalyst can also affect the operation of the motor. To determine a clogged catalyst or not, is quite simple. You would need to warm up the engine, preferably at a high speed. Then from a pit to inspect the device without the use of additional lighting – if they will glow, which means that it has pollution and bad passes exhaust gases.

When the car stalls on the move, then start ("prior" for example) - the problem may be hiding in the exhaust gas recirculation valve (error Р1406). In case the exhaust valve will get jammed in the half-open position, the engine will not develop full powerful...


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Alin Trodden - author of the article, editor
"Hi, I'm Alin Trodden. I write texts, read books, and look for impressions. And I'm not bad at telling you about it. I am always happy to participate in interesting projects."

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