Car Engine Cuts Out When Stopping

Causes of Engine Stalling

Idle Air Control (IAC) Valve Malfunction: The IAC valve regulates the amount of air that enters the engine when it is idling. A faulty IAC valve can cause the engine to stall when it is idling or when it is coming to a stop.
Vacuum Leaks: Vacuum leaks can cause the engine to run lean, which can lead to stalling. Vacuum leaks can occur in a variety of places, including the intake manifold, hoses, and gaskets.
Fuel Pump Problems: A failing fuel pump can cause the engine to stall by not providing enough fuel to the engine. Fuel pump problems can be caused by a variety of factors, including a clogged fuel filter, a faulty fuel pump relay, or a bad fuel pump.
Electrical Problems: Electrical problems, such as a loose or corroded battery terminal, can cause the engine to stall by disrupting the electrical supply to the engine’s ignition system.
Throttle Position Sensor (TPS) Problems: The TPS sensor tells the engine’s computer how far the throttle is open. A faulty TPS sensor can cause the engine to stall by sending incorrect information to the computer.

Symptoms of Engine Stalling

The engine stalls when it is idling or when it is coming to a stop.
The engine runs rough or hesitates when it is idling.
The engine stalls when it is under load, such as when it is climbing a hill or accelerating.
The engine stalls when it is hot or when it has been running for a long period of time.

Diagnosis and Repair

If your car’s engine is cutting out when stopping, it is important to have it diagnosed by a qualified mechanic. The mechanic will be able to determine the cause of the stalling and recommend the appropriate repairs.

Some common repairs for engine stalling include:

Replacing the IAC valve.
Fixing vacuum leaks.
Replacing the fuel pump.
Fixing electrical problems.
Replacing the TPS sensor.

Prevention

There are a few things you can do to help prevent your car’s engine from stalling:

Have your car’s engine serviced regularly. This will help to keep the engine in good condition and prevent problems from developing.
Check the air filter regularly and replace it when it is dirty. A dirty air filter can restrict airflow to the engine, which can lead to stalling.
Keep the fuel system clean by using a fuel system cleaner. This will help to prevent the fuel pump and injectors from becoming clogged, which can lead to stalling.
Avoid driving with a low fuel level. Running out of fuel can damage the fuel pump and lead to stalling.

If you follow these tips, you can help to prevent your car’s engine from stalling.