Chapter 9
TROUBLESHOOTING
9-4
Exhaust Smoke is Black or Dark Gray
Fuel Consumption is High
Engine Oil Consumption is High
Table 9-5 Exhaust Smoke is Black or Dark Gray
Cause
Remedy
Improper fuel
Use proper fuel. Refer to
Incorrect valve clearance
Consult a Mitsubishi dealer.
Faulty fuel feed pump
Consult a Mitsubishi dealer.
Low compression pressure
(worn piston liners, worn piston rings, etc.)
Consult a Mitsubishi dealer.
Insufficient intake air
(improper ventilation, clogged air cleaner)
Clean air cleaner element, or replace if necessary.
Refer to
"Cleaning and Inspecting Air Cleaner Ele-
Incorrect fuel injection timing
Consult a Mitsubishi dealer.
Faulty fuel injection nozzles
Consult a Mitsubishi dealer.
Faulty fuel injection pump
Consult a Mitsubishi dealer.
Table 9-6 Fuel Consumption is High
Cause
Remedy
Faulty fuel feed pump
Consult a Mitsubishi dealer.
Faulty fuel injection pump
Consult a Mitsubishi dealer.
Incorrect fuel injection timing
Consult a Mitsubishi dealer.
Improper fuel
Use proper fuel. Refer to
Low compression pressure
(worn piston liners, worn piston rings, etc.)
Consult a Mitsubishi dealer.
Insufficient intake air
(improper ventilation, clogged air cleaner)
Clean air cleaner element, or replace if necessary.
Refer to
"Cleaning and Inspecting Air Cleaner Ele-
.
Table 9-7 Engine Oil Consumption is High
Cause
Remedy
Excessive amount of engine oil
Maintain correct oil level. Refer to
.
Engine oil viscosity too low
Use engine oil of appropriate viscosity according to ambient tem-
perature.
Refer to
Engine oil leakage
Consult a Mitsubishi dealer.
Worn cylinder liners, worn piston rings
Consult a Mitsubishi dealer.
Worn valve stem seals
Consult a Mitsubishi dealer.