What Are the Causes of Car Body Shaking?

2 Answers
AnnieLee
07/28/25 6:27pm
Here are the causes of car body shaking and their solutions: 1. Unstable oil pressure: Abnormal fuel pump supply pressure or incorrect readings and poor performance of the intake pressure sensor can cause car body shaking. Solution: Check the oil pressure and replace components if necessary. 2. Aging engine components: Car shaking can also be related to worn engine mounts. Engine mounts act as the shock absorption system for the engine, absorbing minor vibrations during operation. If the engine mounts are faulty, these vibrations can transfer to the steering wheel and the cabin, causing shaking at idle. Solution: Replace the components. 3. Severe engine carbon buildup: Dirty throttle body or excessive carbon deposits in the fuel injectors. When there is too much carbon buildup inside the engine, the fuel sprayed by the cold-start injector can be largely absorbed by the carbon deposits, resulting in an overly lean air-fuel mixture during cold starts and making it difficult to start the engine. Solution: Clean the fuel system and check if the idle control valve has carbon buildup that needs cleaning.
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VanJeffrey
08/12/25 12:06am
I recently experienced a problem with car body shaking, which was particularly noticeable on the highway. After inspection, it was found that the tire dynamic balance was off, and uneven wear on the four tires caused body resonance. Another time, during braking on a rainy day, the steering wheel shook violently. The mechanic said it was due to deformed brake discs, caused by uneven cooling after high temperatures leading to an uneven surface. Half-shaft issues are also quite common, especially in front-wheel-drive cars that have been driven for seven or eight years or more. Worn drive shafts can make the area under the seat vibrate like a massage chair during acceleration. Aging engine mount rubbers are even more troublesome; at a red light, the entire dashboard shakes, making you feel like your phone could vibrate right off. Lastly, don't ignore wheel alignment; excessive deviation in the data makes driving feel like riding a rocking horse.
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