TEST OR INSPECTION
EXCESSIVE BLACK EXHAUST SMOKE
Step 1. Check for excessive fuel or irregular fuel distribution.
Check fuel injector timing (Refer to Para 8-5).
Check injector rack linkage adjustment (Refer to Para 8-7).
If necessary, perform complete engine tune up (Refer to Para 8-4 thru
Replace faulty injectors if this condition persists after performing steps a, b,
and c above (Refer to Para 4-38).
Step 2. Check air inlet for restrictions.
a. Clean air cleaner elements.
b. Clean blower housing screen.
Step 3. Check for proper grade of fuel (Refer to appropriate vehicle LO).
END OF TEST
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