Why does an automatic transmission car keep stalling when starting?

[DeSkylar]

Theoretically, automatic transmission vehicles should not experience stalling. If stalling occurs, it is necessary to first determine whether it is a fault-induced stall or a resistance-induced stall. A resistance-induced stall happens when the car's current power is less than the external resistance it faces, making it insufficient to move the car forward, thus causing the engine to stall. A fault-induced stall can be caused by issues in the fuel system, intake system, or ignition system—any problem in one of these three systems can lead to stalling. Common causes of fault-induced stalling include: 1. Problems with the ignition coil; 2. Issues with the spark plugs, such as reaching the end of their lifespan; 3. Problems with the throttle position sensor; 4. Use of low-quality gasoline, leading to clogged fuel injectors. The specific cause of stalling needs to be diagnosed at a 4S shop or a professional repair shop.