TM 9-4940-568-20
2-57
Table 2-7. Engine Troubleshooting (CONT).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
8. ENGINE CRANKS BUT WILL NOT START – NO SMOKE FROM EXHAUST.
Fuel filters plugged with water or other contamination.
Drain fuel/water separator (TM 9-4940-568-10) or replace fuel filters (Para 8-18 and
8-19).
Inspect fuel pump operation.
Refer to Fuel System Priming (TM 9-4940-568-10).
Fuel injection pump not getting fuel or fuel is aerated.
Check fuel flow/bleed fuel system (TM 9-4940-568-10).
Check fuel hoses and lines for restriction. Clear any obstructions or debris.
Maximum inlet restriction to fuel transfer pump must not exceed 100 mm Hg (4 in. Hg).
Air intake or exhaust system plugged.
Visually check; remove the obstruction. Check exhaust system for obstruction.
Check fuse F2 on A11 card.
Check for 19-24 VDC at A11 card TB1 terminal 10.
If no voltage is present, replace A11 card PCB assembly-engine monitor.
Check for 19-24 VDC at engine TB 26 (mounted on right side of engine beneath starter far right terminal).
If no voltage is present, replace wire.
Check for 19-24 VDC at A16 controller B+ terminal.
If no voltage is present, replace wire.
Check for 1.5-3 VAC from magnetic pickup while engine is cranking, with fuel pump wiring disconnected.
If no voltage is present, replace magnetic pickup.
Check for 1.5-3 VAC at controller A16 terminals 5 and 6.
If no voltage is present, replace wire.
Check for approximately 5.25 VDC at fuel injection pump.
If no voltage is present, replace wire.
