What Causes Severe Car Vibration?

1 Answers
Vernon
07/29/25 4:55pm
Car vibration can be caused by the following reasons: 1. Excessive carbon deposits. 2. Fuel supply system failure. 3. Aging engine mounts. 4. Misfiring or cylinder failure. Detailed explanations are as follows: 1. Excessive carbon deposits: Severe carbon buildup in the engine cylinders can lead to clogged spark plugs or valves, directly causing the car to vibrate at idle. If the vehicle's acceleration performance has significantly declined and the vibration persists, an engine cylinder cleaning may be necessary. 2. Fuel supply system failure: Unstable fuel pressure can cause fluctuations in the air-fuel mixture concentration, resulting not only in vibration but also unstable idling. First, consider replacing the fuel filter, as prolonged use may clog it. Then, check the fuel pressure bypassing the fuel filter; if abnormal, the issue may lie with the fuel pump. 3. Aging engine mounts: This is a very common cause of vibration. If the engine vibration worsens over time without a corresponding loss of power, the engine mounts may be the culprit. 4. Misfiring or cylinder failure: This is the most common cause of engine vibration, typically due to issues with the ignition coil or spark plugs. If the ignition coil malfunctions or the spark plug fails to fire for any reason, the car will experience vibration.
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