What Causes Engine Shaking After Car Shutdown?
2 Answers
Car engine shaking after shutdown can be attributed to the following reasons: 1. A dirty engine throttle or excessive carbon buildup on the fuel injector. During cold starts, the gasoline sprayed by the injector may be largely absorbed by the carbon deposits, resulting in an overly lean air-fuel mixture and difficulty starting. 2. Poor performance of the ignition system, including spark plugs, high-voltage wires, and ignition coils. 3. Abnormal fuel supply pressure, incorrect intake pressure values, or malfunctioning sensors. Solutions for engine shaking after car shutdown include: 1. Cleaning the fuel system and inspecting the idle speed control valve to remove carbon deposits. 2. Checking the spark plugs for excessive carbon buildup and replacing them if necessary. 3. Inspecting the fuel pressure and replacing faulty components.
I've encountered this issue before - the car stalls and the engine shakes violently. Common causes include an underperforming ignition system, such as worn spark plugs or loose ignition coils, leading to misfiring and uneven operation. Another possibility is unstable fuel supply; clogged fuel injectors or insufficient fuel pressure can cause inadequate fuel delivery after stalling, exacerbating the shaking. Excessive carbon buildup is also a frequent culprit - deposits on valves or injectors disrupt the air-fuel mixture. If the car hasn't been maintained for a long time, a clogged air filter can worsen the problem. I recommend first checking the spark plugs and ignition coils; a simple replacement might solve it. Safety-wise, severe shaking could cause stalling while driving, which would be especially dangerous on highways - it's best to have a professional conduct a comprehensive diagnosis. Regular throttle body cleaning and using quality fuel additives can effectively prevent this issue.
