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 TM 55-1905-223-24-5
Table 2-2. Troubleshooting-CONT
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
STEP 3.
Check to see if fuel filter is plugged or fuel waxing due to cold weather. Replace fuel
filter (para. 2-27).
STEP 4.
Check to see if fuel suction line restricted. Refer to Malfunction 17, STEP 4.
STEP 5.
Check to see if fuel is contaminated. Drain and clean fuel tank. Replenish fuel.
STEP 6.
Check for low idle speed. Refer to Malfunction 24, STEP 10.
STEP 7.
Check to see if intake or exhaust system restricted
a
Refer to Malfunction 14, STEP 3 for intake.
b.
Refer to Malfunction 14, STEP 4 for exhaust.
STEP 8.
Check to see if injector cup spray holes plugged.
a.
Remove injectors and clean.
b.
Make injector Check (para. 2-34).
c.
Install injector and attempt to start engine.
d.
If engine runs rough, Refer to Malfunction 21, STEP 3.
STEP 9.
Check injection timing. Adjust timing (para. 2-34).
20. Warm engine runs rough or misfires in operating range.
STEP 1.
Check for air in fuel. Refer to Malfunction 18, STEP 5.
STEP 2.
Check to see if fuel is contaminated. Drain and clean fuel tank. Replenish fuel.
STEP 3.
Check for defective injectors as follows:
a
Remove the poppet covers (para. 2-34).
b.
Operate the engine until it is up to 160 (70 ).
F
C
c.
Install Rocker Lever Actuator, P/N ST-1193 on an injector rocker lever.
d.
Hold the injector plunger down while the engine is running at low idle. This will stop the
fuel flow to that injector.
e.
If the engine RPM decreases and/or engine misfires when an injector plunger is held
down, the injector is good.
f.
If the engine RPM does not decrease, replace the defective injector (para. 2-34).
STEP 4.
Check valve and injector adjustments. Adjust valves or injectors (para. 2-34).
Change 2
2-45
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