Fault Symptom: 1. difficult or unable to start 2. easy flameout after starting 3. black smoke at idle speed 4. white smoke at idle speed 5. black smoke under load 6. black smoke when accelerating 7. small power or no power 8. cannot reach calibration speed 9. engine acceleration delay 10. high consumption of olefin oil 11. slow engine deceleration 12. idling instability 13. engine stalled suddenly 14. engine speed fluctuation 15. oil dilution 16. large combustion noise 17. large acceleration noise
Possible Reason: 1. no oil in the tank or stop solenoid failure 2. poor quantity of fuel 3. leakage of oil pipe 4. blocking of oil circuit 5. internal or external fuel leakage 6. nozzle clogging of injector 7. fuel pump drive shaft broken 8. worn or damage of gear pump 9.wrong type of injector cup10. crakle of injector body, plunger sleeve or oil cup 11. damage of injector O ring 12. leakage of injector check valve 13. improper adjustment of throttle 14. wrong installation of idle spring 15. low governor speed adjuxtment 16. water or wax contained in the fuel 17. improper AFC adjustment 18. broken of AFC plunger or plunger sleeve O ring 19. improper adjustment of fuel pump 20. wrong flow of injector 21. leakage of AFC 22.incorrect installation of governor flying block assembly 23. EFC stuck 24. loose fuel pump adaptor
