Chery Fengyun's idle speed is too high and unstable. Ask experts to answer.

There are many possible reasons for unstable idle speed. It's cold season now. If the engine temperature doesn't come up during cold start, the engine will be unstable and tremble at idle speed, so don't worry, it's normal. If the possibility of listing several points is not ruled out, check whether the air filter is blocked and clean it; If the valve seal is not good, it is best to check the sealing of the valve; Check the spark plug gap and carbon deposit, and adjust or clean it; It is also possible that the ignition advance angle is too early or too late, so it is good to adjust it correctly. (If it is not solved, please add more detailed questions) I hope it will help you!