Mitsubishi S6B

11-5
Chapter 11 TROUBLESHOOTING
Exhaust smoke is black or charcoal
Table 11-5 Exhaust smoke is black or charcoal
Cause Remedies
Fuel system
Improper fuel property Use appropriate fuel. (Refer to P4-1)
Faulty fuel feed pump Consult a Mitsubishi dealer.
Faulty fuel injection pump Consult a Mitsubishi dealer.
Faulty fuel injection nozzle Consult a Mitsubishi dealer.
Faulty fuel injection timing
Check fuel injection pump couplings.
Consult a Mitsubishi dealer.
Uneven fuel injection
Check exhaust smoke temperature.
Consult a Mitsubishi dealer.
Inlet and
exhaust
systems
Insufficient amount of air
Check turbocharger. (Refer to P8-15)
Clean, inspect and replace pre-cleaner. (Refer to P8-16)
Clean, inspect and replace air cleaner element. (Refer to P8-
17)
Check intake air pressure and leakage of intake air.
Check intake air temperature and ventilation device.
Consult a Mitsubishi dealer.
Increase resistance of exhaust air
Check turbocharger. (Refer to P8-15)
Check exhaust pipes and silencer.
Consult a Mitsubishi dealer.
Engine
mechanical
Low compression pressure Consult a Mitsubishi dealer.
Faulty valve timing Consult a Mitsubishi dealer.
Rapid wear of sliding parts Consult a Mitsubishi dealer.
Control
system
Increase in load
Check control system and governor controller.
Consult a Mitsubishi dealer.