TM 5-3805-262-20
3-31. FUEL SYSTEM TROUBLESHOOTING (CONT)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. LOW FUEL PRESSURE (Cont).
Step 10. (Cont).
a. If VTM display indicates 3.2 to 9 psi, troubleshooting is com-
plete; problem was clogged fuel suction tube. Disconnect trans-
ducer cable W4 from
ducer, adapter, and
Reinstall elbow and
injection pump feed
b. If VTM display does
low.
pressure transducer. Remove pressure trans -
street elbow from electric fuel pump port.
fuel supply hose between elbow and fuel
pump .
not indicate 3.2 to 9 psi, go to step 11 be-
Step 11. Service electric fuel pump (page 4-14).
Dial 49 into TEST SELECT.
Press and hold TEST until CAL appears on display then release TEST.
Wait for offset value to appear on display. Offset value should be
between -4 to +4. If it is not, STE/ICE is defective (refer to TM
9-4910-571-12&P).
Press and release TEST.
Turn ignition key switch to on position.
VTM display should indicate 3.2 to 9 psi.
Turn ignition key switch to off position.
a .
b .
If VTM display indicates 3.2 to 9 psi, troubleshooting is com-
plete; problem was clogged filter in electric fuel pump.
Disconnect transducer cable W4 from pressure transducer. Remove
pressure transducer, adapter, and street elbow from electric
fuel pump port. Reinstall elbow and fuel supply hose between el-
bow and fuel injection pump feed pump.
If VTM display does not indicate 3.2 to 9 psi, replace electric
fuel pump (page 4-16).
3-255
