What Causes the Engine to Stall When Releasing the Throttle?
2 Answers
The reasons for the engine stalling when releasing the throttle are: 1. Fuel pressure too low, air filter clogged, injector atomization or leakage, improper idle adjustment, poor spark plug performance, air flow meter failure; 2. Internal engine injector dripping or clogging, electrical circuit failure, or insufficient fuel injection; 3. Throttle carbon buildup issues. The throttle is a control device for regulating engine power, part of the vehicle's fuel supply system. By adjusting the pedal pressure, it controls the throttle valve opening, regulates air intake, with the computer managing fuel quantity, thereby controlling engine speed. Additional information: The throttle's function is to control the cylinder's filling volume by adjusting the carburetor's throttle opening and to regulate the fuel flow through the fuel regulator, determining the engine's output power and generating thrust.
Oh, I've personally experienced this issue before with my old car. It would often stall when releasing the accelerator, especially when stopping at red lights, which was quite startling. Later I discovered it was usually caused by a faulty idle control system - that component is responsible for maintaining minimum engine RPM when you're not pressing the accelerator. If carbon buildup is too severe or sensors age, it may malfunction, causing the engine to stall directly. Other possibilities include vacuum line leaks or insufficient fuel supply from the fuel pump, making the engine stall at low speeds. I recommend starting with simple checks: see if the air filter is clogged, or try cleaning the throttle body. During daily driving, pay attention to whether the idle is stable. If you notice any abnormalities, it's best to visit a professional repair shop early to avoid being stranded on the road and compromising safety. Additionally, regular engine maintenance can prevent most such problems - spending a little money now saves big trouble later.
