What Causes Car Idle Vibration?
1 Answers
Car idle vibration is caused by engine carbon deposits, aging or carbon-fouled spark plugs, dirty engine throttle body, poor fuel delivery, or ignition system malfunctions. Engine carbon buildup results from various factors, but primarily stems from poor driving habits. Components like ignition coils, spark plugs, and high-voltage wires have limited service lives - any issues with these parts will disrupt the ignition system and cause idle vibration. Spark plug carbon fouling is particularly problematic, requiring owners to inspect for carbon buildup and replace excessively fouled plugs periodically. Ignition system faults must be addressed promptly, as severe cases may prevent engine starting or even cause sudden stalling during operation, creating unnecessary hazards.