What Causes a Car to Stall at Idle?
1 Answers
Car stalling at idle can be attributed to the following reasons: 1. Function of the idle speed control valve: The idle speed control valve is primarily responsible for maintaining the car's idle speed. Its purpose is to adjust the idle speed based on the engine load during idling. The idle speed control valve is mounted on the throttle body and is controlled by the engine control unit to regulate the engine idle speed. When the engine speed deviates from the idle speed, the throttle valve adjusts the amount of air entering the intake manifold, which is mechanically operated by the accelerator pedal cable. 2. Causes: Air intake system leaks, low fuel pressure, clogged air filter, injector spray pattern issues or leaks, improper idle speed adjustment, faulty spark plugs, malfunctioning mass air flow sensor, ignition system problems, etc.