What are the causes of vehicle jerking?
2 Answers
The causes of vehicle jerking are: 1. High engine idle speed; 2. Improper adjustment of the throttle cable or throttle position sensor, resulting in high main oil circuit pressure; 3. Delayed upshifting; 4. Cracked or loose vacuum hose of the vacuum-type throttle valve; 5. Faulty main oil circuit pressure regulator, causing high main oil circuit pressure; 6. Stuck shock absorber piston, unable to dampen shocks; 7. Missing one-way valve steel ball, leading to fast engagement of shift actuators; 8. Slipping shift actuators; 9. Non-functioning oil pressure solenoid valve; 10. Faulty ECU. The solutions for vehicle jerking are: 1. Clean the oil circuit and throttle body, replace the throttle hose; 2. Replace the shock absorber; 3. Replace the engine oil.
Last month while driving on the highway, I experienced sudden car jerking—it felt like the vehicle abruptly surged forward then slowed down, startling me so much I nearly hit the guardrail. After investigating, I realized it might have been due to spark plugs with excessive carbon buildup from prolonged use failing to ignite properly, or clogged fuel injectors disrupting fuel flow. For automatic transmissions, issues with the clutch or control module can cause even more pronounced jerking during gear shifts, especially noticeable when accelerating or climbing hills. Later, replacing some parts at the garage solved the problem without costing much. For safety, I now check the engine and transmission oil monthly to prevent minor issues from escalating. I advise everyone not to overlook slight abnormalities and address them early.
