Buick Hideo Gt engine wobbles, especially at idle speed, with no fault code and normal speed. The throttle was washed, the spark plug was changed, and the gasoline was changed.

1. In the first case, the throttle is too dirty. After the car started, the engine was idling. At this time, air needs to continuously reach the cylinder through the throttle to burn gasoline. If the throttle valve is too dirty, it will reduce the intake air volume of the intake manifold, which is impossible. ...

2. In the second case, the engine has too much carbon deposit. Too long service life of the engine will cause too much carbon deposition inside and cause engine jitter. ...

3. In the third case, the spark plug or ignition coil is faulty. The spark plug ignites the mixed gasoline and air, thus providing the engine with ...

4. In the fourth case, the fuel pipeline is blocked or the fuel nozzle is blocked. Fuel pipe blockage is rare, but if it is not for a long time, ...