Probable Cause:
1. Fuel System Leaks
Replacement of parts is needed at points of leakage.
2. Defect In Timing Advance Unit
Replacement of timing advance unit is needed.
3. Wrong Fuel Injection Timing
Make adjustment to timing.
4. Fuel Setting Too High
Make adjustment to the fuel setting. Make reference to TMI (Technical Marketing Information) or the Fuel Setting And Related Information Fiche.