10) Check Low Flow Injectors
Connect a 5-amp fused jumper wire between battery voltage and the low flow injector connector C1289F
terminal "D". While connecting the jumper wire, listen for an audible click from the low flow injector and
the sound of fuel flowing through the low flow injector. If no audible click is heard after connecting the
jumper wire, disconnect the jumper wire, wait five seconds, and repeat the step.
Connect a 5-amp fused jumper wire between the low flow injector connector C1289F terminal "A" and
ground. Listen for an audible click from the low flow injector and the sound of fuel flowing through the
low flow injector. If no audible click is heard after connecting the jumper wire, disconnect the jumper
wire, wait five seconds, and repeat the step.
Connect a 5-amp fused jumper wire between the low flow injector connector C1289F terminal "B" and
ground. Listen for an audible click from the low flow injector and the sound of fuel flowing through the
low flow injector.
If each low flow injector makes an audible click and flows fuel, perform COMPUVALVE CHECK
under QUICK TEST. If concern still exists, replace compuvalve. If each low flow injector does not make
an audible click or does not flow fuel, replace low flow injector(s) in question.
TEST DA: FUEL RAIL TEMPERATURE
Diagnostic Aids
Enter this test only when all steps under QUICK TEST have been successfully completed and engine still does
not start or if directed here from another test or chart. This test is only intended to diagnose:
z
Compuvalve.
z
Harness circuits.
z
Powertrain Control Module (PCM).
Fuel Rail Temperature (FRT) sensor is integral to compuvalve. It is mounted in fuel stream and is supplied a 5-
volt VREF signal from compuvalve. DTCs P0182 and P0183 are set when compuvalve receives a FRT signal
less than -79°F (-62°C) or a signal more than 260°F (127°C). Possible causes for these faults are:
z
FRT sensor circuit open.
"F"
(3)
(1)
See Fig. 26 .
(2)
See Fig. 23 .
(3)
LPG only.
CAUTION: Do not apply battery voltage and ground to the low flow injectors for
more than five seconds while performing the following steps or
excess fuel may accumulate in the intake manifold.
2003 Ford Pickup F150
2003 ENGINE PERFORMANCE Self-Diagnostics - Bi-Fuel - Gasoline/LPG