11-6
Chapter 11 TROUBLESHOOTING
Exhaust Smoke is Black or Charcoal
Note: The table above also includes the parts not supplied by Mitsubishi Heavy Industries, Ltd. For the parts not sup-
plied by Mitsubishi Heavy Industries, Ltd., inspect and maintain them by following the manufacturer's operation
manual.
Table 11-5 Exhaust Smoke is Black or Charcoal
Causes Remedies
Fuel system
Improper fuel properties Use appropriate fuel. (Refer to P4-1).
Faulty fuel feed pump operation Consult a dealer of Mitsubishi Heavy Industries, Ltd.
Faulty fuel injection pump Consult a dealer of Mitsubishi Heavy Industries, Ltd.
Faulty fuel injection nozzle Consult a dealer of Mitsubishi Heavy Industries, Ltd.
Faulty fuel injection timing
Check fuel injection pump couplings.
Consult a dealer of Mitsubishi Heavy Industries, Ltd.
Uneven fuel injection
Check exhaust smoke temperature, left and right bank bal-
ance.
Consult a dealer of Mitsubishi Heavy Industries, Ltd.
Inlet and
exhaust
systems
Insufficient amount of air
Check turbocharger. (Refer to P8-21).
Clean, Inspect and Replace Air Cleaner Element.
(Refer to P8-22).
Check intake air pressure and leakage of intake air.
Check intake air temperature and ventilation device.
Consult a dealer of Mitsubishi Heavy Industries, Ltd.
Increase resistance of exhaust air
Check turbocharger.(Refer to P8-21).
Check exhaust pipes and silencer.
Consult a dealer of Mitsubishi Heavy Industries, Ltd.
Control
system
Increase in load
Check control system and governor controller.
Consult a dealer of Mitsubishi Heavy Industries, Ltd.
Basic engine
Low compression pressure Consult a dealer of Mitsubishi Heavy Industries, Ltd.
Faulty valve timing Consult a dealer of Mitsubishi Heavy Industries, Ltd.
Rapid wear of sliding parts Consult a dealer of Mitsubishi Heavy Industries, Ltd.
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