What Causes Jerking When Starting a Car?
1 Answers
Possible causes of jerking when starting a car include: clogged engine oil passages; dirty transmission fluid blocking oil passages; damaged transmission solenoid valves; forgetting to release the handbrake; irregular wear of the clutch, etc. Here is an extended explanation: For automatic transmission vehicles, some jerking during startup is normal. If you need to accelerate sharply while driving, you must press the accelerator pedal deeply. At this point, the automatic transmission will downshift to increase engine RPM. Once the RPM reaches a certain level, it will upshift again. After upshifting, the RPM will drop noticeably, resulting in a relatively pronounced jerking sensation.