TROUBLESHOOTING SERVICE MANUAL NUMBER 22
Page 1C-16 90-860074--1 FEBRUARY 2002
Blue Smoke
Cause Special Information
1. Worn piston rings 1. Check compression
2. Sticking piston rings 2. Check compression
3. Crankcase overfilled - incorrect
dipstick reading
4. Leaking head gaskets
White Smoke
Cause Special Information
1. Injection pump timing incorrect 1. Refer to SECTION 5D
2. Faulty injector(s) 2. Refer to SECTION 5C
3. Low compression
4. Plugged fuel suction line or filter
5. Air leaks, suction side fuel line or water
separating fuel filter
6. Questionable fuel quality 6. Low cetane
7. Restricted fuel return/excessive return
line pressure
8. Leaking head gaskets
9. Inoperative glow plug system 9. Refer to SECTION 4C and/or 5E for
EDI diagnosis
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