What Causes the Jerking Sensation When Releasing the Accelerator Pedal in a Car?
2 Answers
Introduction to the causes of jerking sensation when releasing the accelerator pedal in a car: 1. Engine oil passage blockage. The engine's ignition, air intake, and fuel injectors collectively determine fuel combustion, which is also the source of the engine's power. If the air intake decreases, ignition weakens, or the amount of fuel injected reduces, the power will be insufficient, leading to a jerking sensation. 2. Jerking sensation during the start of an automatic transmission car. When attempting to accelerate sharply while driving, it requires pressing the accelerator pedal deeply. At this point, the automatic transmission will automatically downshift to increase the engine speed. When the speed reaches a certain level, it upshifts. After upshifting, because the speed will drop significantly, a relatively noticeable jerking sensation occurs. This situation is more common in automatic transmission models with fewer gears, such as 4-speed automatic models.
I've been driving for over a decade and have experienced throttle-off jerking issues, where the car suddenly feels like it's stuttering. The most common cause is problems with the fuel system, such as clogged fuel injectors or a weak fuel pump, leading to inconsistent fuel supply when releasing the throttle. Issues with the ignition system, like worn spark plugs or faulty ignition coils, can also make the engine respond unevenly. Additionally, worn clutch plates in automatic transmissions can exacerbate this sensation, especially at low speeds. The last time my car had this issue, I checked the air filter and found it was too dirty, affecting airflow—cleaning it made a big difference. Regular maintenance of the fuel system and transmission can effectively prevent these problems and ensure driving safety. I recommend having a mechanic inspect these components during every oil change.
