TM 5-3895-373-34
Table 2-1. Engine Troubleshooting - Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
6.
ENGINE KNOCKING.
WARNING
Fuel is very flammable and can explode easily. To avoid serious injury or death:
Always wear safety glasses/goggles at all times.
Keep fuel away from open flame or any spark (ignition source).
Keep at least a B-C fire extinguisher within easy reach when working with fuel or on a fuel system.
Do not work on a fuel system when engine is hot; fuel can be ignited by a hot engine.
Post signs that read, "NO SMOKING W ITHIN 50 FEET" when working with open fuel lines or
fuel tanks.
Direct contact with a high pressure fuel spray may cause serious injuries. Avoid direct contact
with fuel spray. If fuel spray penetrates your skin, get medical aid immediately. Eye protection
and rubber gloves should be worn when working with fuel.
Step 1.
Open front top left access door per TM 5-3895-373-10. Check function of fuel injectors.
NOTE
A drop in engine speed caused by loosening fuel line supplying fuel injector indicates the injector
was delivering fuel to cylinder. If engine speed is not affected by loosening fuel line supply to fuel
injector, fuel injector is faulty or is not receiving fuel.
Run engine per TM 5-3895-373-10. Loosen fuel line at one injector and listen for a change in engine speed.
Check injector for each cylinder until faulty fuel injector is found.
If a fuel injector is determined faulty, replace fuel injector per paragraph 2.18 or replace or repair
fuel line to injector.
If replacement of a fuel injector or fuel line does not correct the malfunction, or is not out of
adjustment, replace/repair fuel injection pump per paragraph 2.19.
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