What Causes Severe Car Shaking?
2 Answers
Severe car body shaking can be attributed to the following reasons: 1. Excessive Carbon Deposits: If there is severe carbon buildup inside the engine cylinders, it can lead to clogged spark plugs and valves, directly causing the car to shake during idling. If the car's acceleration performance has significantly declined and the shaking persists, consider cleaning the engine cylinders. 2. Fuel Supply System Malfunction: Unstable fuel pressure can cause fluctuations in the mixture concentration, resulting not only in shaking but also unstable idling. First, consider replacing the fuel filter, as the filter element may become clogged after prolonged use. Then, check the fuel pressure bypassing the fuel filter; if it is abnormal, the issue might lie with the fuel pump. 3. Worn Engine Mounts: A less common cause of shaking. If the car's engine shaking worsens over time but the power output remains unaffected, it might be due to worn engine mounts. 4. Misfiring Cylinders: This is the most common cause of engine shaking. The problem usually lies with the ignition coils or spark plugs. If the ignition coils malfunction or the spark plugs fail to fire for some reason, the car will exhibit shaking.
I've found that severe car shaking is usually closely related to engine issues. Spark plugs tend to deteriorate over time, causing ignition failure or instability, which increases engine vibration. Faulty ignition coils can also cause this, as they're responsible for delivering high-voltage electricity to the spark plugs. Fuel system problems are equally common – clogged fuel injectors can lead to uneven gasoline spray and incomplete combustion, resulting in shaking. A dirty air filter affects air intake, and if engine mounts become worn or loose, they can't properly stabilize engine vibrations, especially noticeable during acceleration or startup. I've discovered that regularly replacing spark plugs and cleaning the throttle body can significantly reduce this shaking. Using higher-quality gasoline also helps avoid severe carbon buildup from poor-quality fuel. Long-term neglect not only wastes fuel but may cause more serious damage, so I recommend immediate inspection or professional servicing when shaking occurs – don't wait until problems escalate. Driving habits matter too – smooth driving with less sudden acceleration helps extend engine life.
