When the throttle bumps.

Remove carbon deposits and replace spark plugs.

1. Remove carbon deposit: The carbon deposit on the throttle valve is generated during engine operation. When the vehicle is idling, the carbon deposit will absorb a certain amount of mixed gas, which will make the vehicle idling unstable and lead to bumps. Car owners can clean up the carbon deposits on the throttle.

2. Replace the spark plug: the spark plug fails, the engine ignition system fails, and the vehicle is prone to bumps when driving. The owner can replace the spark plug.