TROUBLESHOOTING
SERVICE MANUAL NUMBER 22
90-860074--1 FEBRUARY 2002 Page 1C-15
Engine Smoking
Black Smoke
Cause Special Information
1. Overload
2. Restricted air cleaner and /or
intercooler
3. Excessive fuel delivery 3. Refer to SECTION 5E for EDI
diagnosis
4. Faulty injector(s) 4. Refer to SECTION 5C and / or 5E for
EDI diagnosis
5. Restricted or plugged exhaust
6. Insufficient coolant temperature
7. Excessive idle time (injector coking)
9. Leaking head gaskets
10. Worn piston rings
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