Why Does the Car Shake While Driving?
3 Answers
Car shaking may be caused by issues in the fuel system, details are as follows: Incomplete fuel combustion: Shaking during startup is caused by incomplete fuel combustion, leading to insufficient car power. Severe carbon buildup: Idle shaking is due to severe carbon buildup in the engine, ignition system problems, or unstable oil pressure. Tire malfunction: High-speed shaking is caused by excessively high or low tire pressure, abnormal tire wear, rim deformation, shock absorber failure, or tire imbalance issues. Engine mount aging: Engine mounts act as the shock absorption system for the engine, responsible for absorbing minor vibrations during operation. If the engine mounts fail, these vibrations will transfer to the steering wheel and the cabin, causing the car to shake.
Last time I drove on the highway, I also experienced body vibration, so I specifically asked an experienced auto repair technician. He said the most common cause is the wheel balancing weights falling off, and getting a dynamic balance for 80 yuan can solve it. If the steering wheel shakes badly, it's most likely an issue with the front wheels; if it's the rear wheels, the seat will vibrate more noticeably. Also, a bent driveshaft can cause the whole car to shudder during acceleration, especially in older cars where the CV joint wear needs attention. The most troublesome issue is aging engine mount cushions, where the vibration can even be felt through the steering wheel. He reminded everyone not to overlook brake disc warping, which is most likely to occur after hard braking followed immediately by driving through a puddle. Shaking during braking is a clear sign of this.
As a veteran driver with 15 years of diesel car experience, I'm most afraid of encountering the unique vibration issues of diesel engines. Clogged fuel injectors can make idling feel like sitting on a massage chair, while unstable high-pressure fuel pump pressure can produce rattling noises. Remember to check if the engine mounts have collapsed, as aged rubber can directly transmit engine vibrations into the cabin. Not replacing the diesel filter for too long can also easily cause fuel supply issues, making the vibration occur intermittently like asthma. Additionally, an EGR valve stuck in the open position can lead to excessive exhaust gas recirculation, directly affecting combustion stability. I recommend diesel car owners clean intake manifold carbon deposits every 50,000 kilometers.
