Why does the car stall when stationary?

A car may stall when stationary due to several reasons, including a malfunctioning ignition system, fuel delivery issues, or problems with the engine's air intake. When the engine is not receiving the right mixture of air and fuel, or if the spark plugs are failing, it can lead to a loss of power, causing the engine to shut off. Additionally, if the idle speed is set too low or if there are issues with the idle air control valve, the engine may struggle to maintain operation when not in motion. Regular maintenance can help identify and resolve these issues.