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 TM 55-1905-223-24-3
Table 2-2. Troubleshooting-Cont
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
19. Engine starts but will not keep running.
STEP 1. Check for air in the fuel system.
Refer to Malfunction 18, Step 5.
STEP 2. Check if fuel filter is plugged or fuel waxing due to cold weather.
Replace fuel filter (para. 2-31).
STEP 3. Check for idle speed too low (para. 2-10).
Adjust idle speed (refer to para. 2-10).
STEP 4. Check if fuel suction line is restricted.
Inspect fuel lines. Refer to Malfunction 17, Step 4.
STEP 5. Check if fuel is contaminated.
Check, drain, clean and replace.
STEP 6. Check if intake or exhaust system is restricted.
a. Check intake and exhaust restriction. (Refer to para. 2-29 and Item No. 14 of this table).
b. Check for correct injector timing (para. 2-39).
STEP 7. Check plugged injector cup spray holes.
Remove injectors and clean (para. 2-40).
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.
If contaminated drain, clean and replace fuel.
STEP 3. Check for defective injectors as follows:
a. Remove the poppet covers (para. 2-39).
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 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 injection timing.
Adjust timing (para. 2-40).
2-40
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