Isuzu C-240PW-28, Technical Manual, Page: 31 / 235

ARMY TM 9-2815-254-24
AIR FORCE TO 38G1-94-2
Table 3-2. Troubleshooting - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
4. ENGINE HARD TO START OR WILL NOT START IN COLD WEATHER.
step 1. Check for faulty glow plugs.
a. Test glow plugs. Refer to paragraph 3-22.3. If glow plugs not defective, do step 2.
b. Replace defective glow plugs. Refer to paragraph 3-22.
Step 2. Refer to Malfunction 3 and perform steps 1 through 5.
5.
ENGINE MISFIRES OR RUNS IRREGULARLY OR STALLS FREQUENTLY.
Step 1.
Step 2.
Step 3.
Step 4.
step 5.
Step 6.
step 7.
Check for fuel being supplied to fuel injection pump.
a. Test feed pump capacity. Refer to paragraph 3-11.5 step aj. If feed pump not defective, do
step 2.
b. Repair or replace fuel feed pump. Refer to paragraph 3-11.
Check for air in fuel system lines.
Bleed fuel system at fuel fitter. Refer to paragraph 3-12. If no air, do step 3.
Check for tow coolant temperature.
a. If coolant temperature not low, do step 4.
b. Replace defective thermostat. Refer to paragraph 3-6.
Check for fuel injector nozzle dirty, defective or leaking.
a. Clean and test fuel injector. Refer to paragraph 3-10. If not defective, do step 5.
b. Replace fuel injector nozzle. Refer to paragraph 3-10.
Check for improper fuel injection timing.
a. Check fuel injection timing. Refer to paragraph 3-13.1. If fuel injection timing is correct, do
step 6.
b. Adjust fuel injection timing. Refer to paragraph 3-13.2.
Check for defective fuel injection pump.
a. Remove and test fuel injection pump. Refer to paragraph 3-11.5. If not defective, do step 7.
b. Replace fuel injection pump. Refer to paragraph 3-11.
Check for valves improperly adjusted.
a. Adjust valves. Refer to paragraph 3-26.6. if properly adjusted, do step 8.
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