Why does the car shake at 100?

There are many reasons for steering wheel jitter when the vehicle speed reaches 100km/h, as follows:

1. Check whether the spark plug is damaged;

2. Oil circuit/oil product problem, it is suggested to drive this tank of oil to a regular gas station to refuel and try the effect again;

3. Whether the starting motor is abnormal and whether the engine speed is abnormal at idle speed;

4. Whether the air intake system is abnormal and the air path is smooth;

5. Engine carbon deposit, lower throttle and nozzle cleaning;

6. It may be that the four-wheel inclination angle is abnormal or the vehicle dynamic balance is abnormal, which needs to be checked;