What Are the Reasons for Severe Car Vibration?
2 Answers
Severe car vibration can be caused by: 1. Ignition system issues: If there is a malfunction in the car's ignition system, it can lead to poor ignition system performance, weak spark plug firing, and other problems, resulting in unstable idling; 2. Worn or loose engine mounts: Engine mounts are rubber blocks placed between the engine and the car frame; 3. Carbon buildup: Carbon deposits can accumulate in the cylinders, throttle body, spark plugs, and intake system. When there is excessive carbon buildup inside the engine, it affects the ignition energy, air intake efficiency, and air-fuel mixture ratio, leading to unstable power output and causing vibrations during idling and acceleration.
Last time my car shook like a massage chair, so I rushed to get it checked. Severe engine carbon buildup is a common cause, especially for cars frequently driven in urban areas. Worn-out spark plugs can also cause shaking - they should be replaced when needed, typically requiring inspection every 40,000 km. Incorrect tire balancing or deformed rims will cause severe shaking at high speeds. If the engine mount rubber is aged, the entire steering wheel will vibrate; this component buffers engine vibrations, and rubber parts generally last no more than six years. A dirty throttle body or poor fuel quality can also cause shaking - switching from 92-octane to 95-octane gasoline might help. If the idle shaking is particularly bad, it could be a faulty ignition coil. Never ignore shaking - checking these four areas first is always the right approach.
