What are the reasons for the engine stalling when releasing the accelerator pedal?
3 Answers
The reasons for the engine stalling when releasing the accelerator pedal are: 1. Fuel pressure too low, air filter clogged, injector atomization leakage, improper idle adjustment, spark plug malfunction, air flow meter failure; 2. Fuel injector inside the engine dripping or clogged, circuit failure or insufficient fuel injection; 3. Throttle body carbon buildup issue. The accelerator pedal is a control device for regulating engine power, part of the automobile fuel supply system. By controlling the pedal depression amount, it regulates the engine throttle opening, controls air intake, while the computer manages fuel quantity, thereby controlling engine speed. The function of the accelerator pedal: By controlling the throttle opening of the carburetor, it regulates cylinder filling volume and controls the metered fuel flow of the fuel regulator, determining engine output power and generating thrust.
I always enjoy fixing cars myself and have encountered several instances where the engine stalls when I release the throttle. This is usually due to an issue with the idle control system, such as a dirty throttle body getting stuck and preventing air from entering. Another common cause is an aging idle control valve or idle motor, which fails to supply enough fuel when the RPM drops, causing the engine to stall as if it lost power. Additionally, problems in the fuel system, like clogged fuel injectors, can lead to uneven fuel delivery and sudden power loss. My old car had this issue before, and it improved significantly after cleaning the throttle body and replacing the fuel injectors. Regular inspection and maintenance of these components can prevent such problems. If you notice this happening on the road, avoid forcing the car to run to prevent further damage. In short, start with simple checks—unstable idle is an early warning sign, and addressing it promptly or seeking professional help can save you time and money.
As a car owner, I'm quite concerned about this issue. Stalling when releasing the throttle not only affects driving but also easily leads to accidents. Common causes include faults in the mass airflow sensor or oxygen sensor. These sensors inform the computer about the fuel supply quantity, and once they malfunction, the computer's control becomes chaotic, causing the car to stop. There are also ignition system problems, such as aging spark plugs failing to ignite properly, which is more noticeable at low speeds. I remember one time when the sensors got damp on a rainy day, and the car stalled, leaving me stranded on the highway. For safety's sake, promptly check the related wiring and vacuum lines for leaks or moisture. During maintenance, have the technician test these components; usually, cleaning or replacement can resolve the issue. Don't underestimate it—this is a driving hazard. Paying regular attention to the fuel system and cleanliness can significantly reduce the risk.
