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Why is there a jerking sensation when releasing the accelerator while driving?

2 Answers

VanHolden

07/24/25 10:51am

Here are the reasons for the jerking sensation: 1. Excessive carbon deposits on the throttle, fuel injectors, and intake manifold: Many faults are caused by carbon deposits, and some vehicles may experience jerking due to carbon buildup. It is recommended to regularly clean carbon deposits. 2. Fuel-related issues: Poor fuel quality leading to incomplete combustion. 3. Faults in spark plugs, ignition coils, etc.: These may cause cylinder misfires, requiring inspection and repair at a service center to avoid further safety hazards. 4. Sludge in the transmission fluid: Sludge forms due to friction-generated contaminants during normal gear operation. Over time, sludge can circulate in the transmission, potentially clogging the oil passages in the valve body. Once the passages are blocked, jerking issues may arise. In such cases, the transmission may exhibit symptoms like overheating, impact, and slippage. Adding new transmission fluid and a cleaning agent, then draining it after half an hour, can resolve the issue.

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CalvinDella

08/11/25 5:51am

I used to notice that after releasing the throttle, the car would jerk and shake, feeling like it was being pushed or suddenly slowing down, which was quite uncomfortable. This could be related to several common issues: carbon buildup in the throttle body, causing uneven airflow into the engine, making it hard for the ECU to adjust when releasing the throttle; worn transmission gears or slipping clutch plates, especially common in aging automatic transmissions; or spark plugs with excessive gap due to prolonged use, leading to unstable ignition and affecting power output. A clogged fuel injector in the fuel system can also cause intermittent fuel supply. I believe regular maintenance is key—for example, cleaning the throttle body and checking spark plugs every 20,000 kilometers can help reduce such annoyances. If the jerking becomes severe, slow down and pull over to avoid potential accidents.

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