What Causes an Automatic Transmission Car to Stall?

[DelOwen]

Automatic transmission cars may stall due to reasons such as expired vehicle battery lifespan, high-voltage circuit malfunctions, or clogged engine fuel supply lines. Expired Vehicle Battery Lifespan: When the battery reaches the end of its service life, its capacity and output voltage decrease. This directly leads to abnormal starter operation, insufficient voltage, and issues like the engine spark plugs failing to generate sparks. In severe cases, it can even cause the engine to stall and make starting difficult. Replacing the battery resolves this issue. Vehicle High-Voltage Circuit Malfunction: Inspect the high-voltage circuits for signs of aging, detachment, short circuits, or open circuits. Clogged Engine Fuel Supply Lines: Abnormal fuel supply can interrupt the engine's stroke. Alternatively, severe carbon buildup or erosion on the spark plugs in the cylinders may cause unstable ignition, leading to difficult engine starts and abnormal stalling during throttle changes. Solution: Perform regular cleaning and maintenance on the engine's oil circuits (including fuel supply and lubrication lines), promptly inspect and replace spark plugs. If necessary, conduct a carbon removal treatment inside the cylinders.