What Causes the Engine to Stall After Releasing the Accelerator?
2 Answers
The reasons for the engine stalling after releasing the accelerator are: 1. Fuel pressure too low, air filter clogged, injector atomization leakage, improper idle adjustment, poor spark plug performance, air flow meter failure; 2. Internal engine injector dripping or clogging, circuit failure, or insufficient fuel injection; 3. Carbon buildup in the throttle. The accelerator is a control device for regulating engine power, part of the vehicle's fuel supply system. By adjusting the pedal's depression, it controls the throttle opening, regulates air intake, and the computer controls the fuel amount, thereby managing engine speed. Extended content: The function of the accelerator: By controlling the throttle opening of the carburetor, it regulates the cylinder's filling volume and the metered fuel flow of the fuel regulator, determining the engine's output power and generating thrust.
I encountered this issue while driving some time ago. The car ran normally when accelerating, but stalled immediately when releasing the throttle. This problem is usually related to the intake system - either excessive carbon buildup on the throttle body causing poor valve operation, or a stuck idle control valve. Last time I fixed it by cleaning the throttle body. Additionally, you should check the vacuum lines for leaks, as rubber hoses in older cars tend to deteriorate and crack. Air leaks can disrupt the air-fuel mixture ratio. A clogged fuel filter may also cause insufficient fuel supply, leading to stalling after sudden acceleration when the fuel system can't keep up. For sensors, pay special attention to whether the throttle position sensor is providing accurate data - incorrect readings will make the ECU unable to properly control fuel injection. It's best to fix such issues promptly, as sudden stalling at traffic lights can be extremely dangerous.
