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Causes and solutions of car body shaking

December 22,2022


1. First of all, start from the cold start.

The main reason for the shaking of the body at the cold start is that the fuel is not fully burned, resulting in insufficient power of the car. The ignition energy is low, and when starting, especially when the temperature of the fuel and lubricating oil is low, more fuel is needed to satisfy the power. After a long time, the pole gap of the spark plug has gradually become larger, resulting in a decrease in ignition energy and poor fuel atomization, which causes the body to vibrate. In addition, the aging of the ignition coil,  the aging of the high-voltage line of the spark plug or the leakage of electricity can also lead to a decrease in ignition energy. Therefore, it is necessary to replace the spark plug and ignition coil in time, and the products of the torch are recommended.


2. Problems with the shock absorber system.

Body shake is also related to the aging of the shock absorber system. When the engine is idling, it is also easy to cause shaking when the electrical system in the car is turned on. The engine will increase the load due to turning on the electrical appliances, causing the idle speed to drop, and in order to compensate for the vibration caused by the idle speed slip, the engine will automatically increase the speed by a part. Therefore, when the electrical system is turned on, especially the air conditioner, the engine will often vibrate. This kind of jitter is probably caused by the aging of the shock absorber and needs to be replaced in time. 3. Tire problems For tires, when the car is replaced with new tires and new steel rims, the tires must be balanced once, otherwise the steering wheel is prone to shake when the counterweight is uneven. If it is found that the weight of the tires is uneven, it is necessary to add lead weights to the inner side of the steel ring to average the weight of the tires on both sides. 4. Throttle problem. The most common reasons for car jitter may be that the throttle valve is too dirty and the fuel injection nozzle has too much carbon deposit. When the body shakes, check the throttle valve and fuel injector first. If it is found that the throttle valve is too dirty or the fuel injection nozzle has too much carbon deposit, it should be cleaned with fuel nozzle cleaning agent, throttle valve cleaning agent, etc. in time. 5. The oil pressure is unstable. It is recommended to go to the repair shop to check whether the fuel supply pressure and intake pressure sensor are normal.

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