Suggest to diagnose at workship, usually the keypoints of diagnose are:
1. Check the worn level of the engine mounting, replace the engine mounting.
2. Clean the contaminated system thoroughly, replace the fuel filter, clean the fuel hose and fuel tank, replace fuel pump, clean the injector.
3. Check and replace the spark plug; check and set the electronic ignition system.
4. Check or replace the engine mechnical system, fuel supply system, intake system, intake system and drive-by-wire system.