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Page Title:
EXCESSIVE BLACK OR GRAY EXHAUST SMOKE (ENGINE AT NORMAL OPERATING TEMPERATURE). (Cont) |
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 TM 9-2320-364-34-1
4. EXCESSIVE BLACK OR GRAY EXHAUST SMOKE (CONT).
6.
KNOWN INFO
TEST OPTIONS
WARNING
Read WARNING
Unit Troubleshooting tasks
STE/ICE-R #32.
on Page 2-89
completed.
Injector response times OK.
REASON FOR QUESTION
Injector pulse widths OK.
Is air box pressure less than
Injector timing OK.
Air box pressure less than the
Blower bypass valve OK.
pressures listed in Table 2-7
the pressures listed in Table
Cylinder air inlet ports clear.
indicates a faulty blower. A
decrease in air box pressure will
cause a rich fuel to air ratio and
POSSIBLE PROBLEMS
black or gray exhaust smoke.
Low air box pressure.
Replace engine
(Para 3-4).
NO
Verify repair, go to
Step 7 of this Fault.
YES
Replace blower
(Para 4-4).
Verify repair, go to
Step 7 of this Fault.
2-88
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