Why An Engine Stalls At A Stop & How To Fix It

If the torque converter is broken, or worn, or the transmission is low in transmission fluid, the converter will not work properly. The car will be unable to maintain pressure at low speeds which will cause the engine to shut off. A defective TCS (Torque Converter Solenoid) can also cause the same issue.

Air-Flow Sensor
The Mass AIrflow sensor (MAF) Is located between the air filter and the intake on the engine. The mass air flow sensor measures the amount of air entering the engine. A faulty mass air flow sensor could affect your air fuel ratio which would affect how your vehicle idles and at low speeds.
(A mass air flow sensor can be cleaned with carb cleaner or change it if it’s bad).

Oxygen Sensor
The oxygen (O2) sensor is mounted in the exhaust manifold to monitor how much unburnt oxygen is exiting the engine. It tells the engine if the fuel mixture is burning too lean, (not enough fuel). So you’re advise to change it if it’s bad.

Injector Faults
The fuel system would be a logical place to check if your car engine is stalling when you come to a stop. (A dirty fuel filter or a worn fuel pump might be the fault).

The fuel pump is responsible for pumping the fuel from the gas tank to the injector and applying the pressure needed to inject the fuel into the cylinders. A slight pause in fuel pressure could be enough to stall the engine. Click link view the full post

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