Mitsubishi S4S

11-3
Chapter 11 TROUBLESHOOTING
Output decrease
Table 11-3 Output decrease
Cause Remedies
Fuel system
Improper fuel property Use appropriate fuel. (Refer to P4-1)
Clogged fuel filter
Inspect and replace fuel filter. (Refer to P8-6) or
(Refer to P8-7)
Gauze filter - Clean
Faulty fuel feed pump 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 Consult a dealer of Mitsubishi Heavy Industries, Ltd.
Improper amount of injected fuel
Check fuel injection pump rack stroke.
Consult a dealer of Mitsubishi Heavy Industries, Ltd.
Cooling
system
Overheat, overcooled
Check fan and radiator.
Check control system.
Consult a dealer of Mitsubishi Heavy Industries, Ltd.
Inlet and
exhaust
systems
Insufficient amount of air
Check turbocharger. (Refer to P8-14)
Clean, inspect and replace pre-cleaner. (Refer to P8-15)
Clean, inspect and replace air cleaner element.
(Refer to P8-16)
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 P8-14)
Check exhaust pipes and silencer.
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.
Control
system
Faulty governor control
Consult a dealer of Mitsubishi Heavy Industries, Ltd.