Chapter 11 TROUBLESHOOTING
11-4
Exhaust smoke is black or dark gray
Fuel consumption is high
Engine oil consumption is high
Table 11-5 Exhaust smoke is black or dark gray
Cause Remedy
Improper fuel Use proper fuel. Refer to "FUEL" (4-1).
Incorrect valve clearance Contact your local Mitsubishi dealer
Faulty fuel feed pump Contact your local Mitsubishi dealer
Low compression pressure
(worn piston liners, worn piston rings, etc.)
Contact your local Mitsubishi dealer
Insufficient intake air
(improper ventilation, clogged air cleaner)
Clean air cleaner element, or replace if necessary. Refer to "Clean-
ing, inspecting, and replacing the air cleaner element" (8-12).
Incorrect fuel injection timing Contact your local Mitsubishi dealer
Faulty fuel injection nozzles Contact your local Mitsubishi dealer
Faulty fuel injection pump Contact your local Mitsubishi dealer
Table 11-6 Fuel consumption is high
Cause Remedy
Faulty fuel feed pump Contact your local Mitsubishi dealer
Faulty fuel injection pump Contact your local Mitsubishi dealer
Incorrect fuel injection timing Contact your local Mitsubishi dealer
Improper fuel Use proper fuel. Refer to "FUEL" (4-1).
Low compression pressure
(worn piston liners, worn piston rings, etc.)
Contact your local Mitsubishi dealer
Insufficient intake air
(improper ventilation, clogged air cleaner)
Clean air cleaner element, or replace if necessary. Refer to "Clean-
ing, inspecting, and replacing the air cleaner element" (8-12)
Table 11-7 Engine oil consumption is high
Cause Remedy
Excessive amount of engine oil Maintain correct oil level. Refer to "Checking the engine oil level" (3-2).
Engine oil viscosity too low
Use engine oil of appropriate viscosity according to ambient tem-
perature. Refer to "ENGINE OIL" (5-1)
Engine oil leakage Contact your local Mitsubishi dealer
Worn cylinder liners, worn piston rings Contact your local Mitsubishi dealer
Worn valve stem seals Contact your local Mitsubishi dealer
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