Why does the car shake when releasing the accelerator?
2 Answers
Shaking when releasing the accelerator may be caused by mismatched engine and transmission, clutch issues, or loose ball joints in the steering linkage creating gaps. Precautions for accelerator operation are as follows: 1. Starting: Use your right heel on the floor as a pivot point, gently press the accelerator with your foot, and control it with ankle movements. Apply and release pressure smoothly and gradually. 2. Engine startup: Don't press the accelerator fully; keep it slightly above idle speed. When moving off, apply throttle slightly before the clutch engagement point, using moderate throttle opening. Coordinate clutch release with accelerator operation precisely. 3. Driving: Adjust throttle according to road conditions. Select appropriate gears to keep the engine mostly running at medium RPM with larger throttle openings for fuel efficiency. Coordinate throttle, clutch, and gear changes smoothly.
When the car shakes upon releasing the throttle, it is often due to excessive carbon buildup inside the engine, which reduces combustion efficiency. Worn spark plugs or faulty ignition coils can also cause unstable idling, especially during cold starts or after prolonged driving. If the car is a manual transmission, issues like clutch pressure plate wear or release bearing problems may lead to shaking when the throttle is released. Additionally, aged or detached engine mount rubber, causing poor fixation, can result in similar symptoms. Regularly cleaning the throttle body and fuel injectors can prevent carbon buildup—it's recommended to check every 10,000 kilometers. Don’t ignore these minor issues, as worsening shaking can affect driving safety and even damage engine components. I’ve seen similar cases before, and timely repairs can restore normal performance.
