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Page Title:
TROUBLESHOOTING FUEL SYSTEM |
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 52. TROUBLESHOOTING AIR INDUCTION SYSTEM - Continued
Corrective action
Probable causes
Malfunction
Replace manifold gaskets
2.
Loss of engine power.
a.
Air leak in intake manifold
a. (par. 87). Refer to TM
gaskets or hoses.
9-2320-235-20 and replace
deteriorated air induction
hoses.
Replace turbosupercharger
b.
Turbosupercharger worn,
b. (par. 62). Refer to TM
plugged, or failed.
9-2990-201-35 for turbo-
supercharger repair and
rebuild procedures.
a.
1.
No fuel being de-
a.
Troubleshoot vehicle fuel
Defect in vehicle fuel
livered at fuel
system. Refer to TM 9-
delivery system or
injector nozzle and
2320-235-20 for proce-
air in fuel lines.
holder assemblies.
dures.
b.
Replace primary fuel
b.
Plugged primary fuel
filter or defective filter
filter (par. 72). Replace
bypass valve.
defective filter bypass
valve (par. 213).
Replace final fuel filter
Plugged final fuel filter.
c.
c.
Damaged fuel hoses and/
Replace defective or dam-
d.
d.
or tubes.
aged fuel hoses (par. 78)
and fuel injection tubes
Check fuel return valve.
e.
Defective fuel injection
e.
pump or fuel return valve
Refer to TM 9-2910-
on pump.
223-35. Remove fuel
injection pump (par. 63b).
Refer to TM 9-2910-
223-35 for fuel injection
rebuild procedures. Re-
place pump when neces-
sary. Install pump (par.
63--).
c
2.
Fuel being delivered
a.
Defective fuel injector
a.
Remove fuel injector noz-
at nozzles but engine
zle and holder assemblies
nozzle and holders.
will not run, start,
or runs rough on one
and/or repair fuel injector
or more cylinders.
nozzle and holder assem-
lies (par. 83c through i).
Install nozzle and holder
assemblies (par. 83j ). Re-
place nozzle and holder
assemblies only when
necessary (par. 83).
50
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