Several reasons cause a car stalling while accelerating but I have not known this not until it happens on me when my car stalls when I accelerate, I started diagnosing this problem and found out that the cause of car stalling while accelerating depend on the situation and the condition when the problem occurs.
When the car stall during cold rainy mornings
If the problems happened in this condition it means that the cause of stalling is moisture on a distributor cap because during the night when you park your car outside the garage especially when raining there is a formation of condensation inside the distributor cap. If moisture forms it will allow electrical current inside the distributor cap this current will lead to misfiring and will become severe to the point that the car will stall when the car is accelerating.
How will you avoid this problem?
If you anticipate that it is about to rain, park the car inside a covered parking and leave it there for overnight and there will be no formation of condensation inside the distributor cap.
When the car stalling gradually become frequent
If the problem happens gradually after the first time it was happen then the possibilities is that the car is suffering from a vacuum leak. The problem of vacuum leak usually starts out small then gradually become worst because of the pressure inside the engine. In determining how much is the fuel the car can get one of the key factors is the vacuum created in the fuel system.
Now, if there is vacuum leak on the fuel system it will it will affect the air/fuel mixture that enters the combustion chamber and will result to engine stalling. Bring the car to your dealer then ask the mechanic to check the engine for vacuum leak. Usually the EGR and the PCV valve is the most common source of vacuum leak.
When the car stalling suddenly happens at any given temperature
When the car happens suddenly the possible problem is the bad throttle position. Engine with fuel injected system have a part called throttle position sensor, the purpose of this device is to measure how far the driver pressed the gas pedal and thus the throttle. All data that is gathered will then feed to the engine computer which does the calculation, based on the calculation the resulting data will be used to determine how much gas the fuel injection system should inject to the engine combustion chamber.
Now, if the throttle position sensor provides a wrong data to the engine computer it will adversely affect the injection of the gas into the engine and this will result to engine stalling. Bring the car to a shop and ask the mechanic to check the throttle position sensor then repair if necessary this will fix the car stalling while accelerating.