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  1. D

    2001 Mustang Gt Will Not Start

    Sorry, wrote that wrong. It's been a long weekend. The CCRM relays voltage to the inertial fuel shutoff. The inertial fuel shutoff relays voltage to the FPDM. The FPDM relays voltage to the fuel pump.
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    2001 Mustang Gt Will Not Start

    It's my fuel pump. The wiring diagram in Hayne's is wrong, big surprise. The inertial fuel cutoff does not run directly to the fuel pump (as Hayne's indicates). As best as I can determine, the inertial fuel cutoff acts as a sensor input into the fuel pump driver module (FPDM) which controls...
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    2001 Mustang Gt Will Not Start

    LOL, ok. I found the schematics for the CCRM. Tomorrow I'm going to check all the fuses to make sure the ECU and CCRM are both getting power. Then I'll check the inputs and outputs to the CCRM to make sure they are good. Hopefully that will identify the problem. At least I'm getting closer...
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    2001 Mustang Gt Will Not Start

    Are you talking about the Fuel Pump Driver Module (FPDM). Is that between the inertial shut off and the fuel pump or is the inertial shut off between the FPDM and the fuel pump?
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    2001 Mustang Gt Will Not Start

    I'm studying the wiring diagram today. It looks like the hot for the inertia fuel shut-off switch in the trunk comes directly from the constant control relay module (CCRM) which also feeds the same hot line to the PCM. Any idea how to test if the CCRM is bad?
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    2001 Mustang Gt Will Not Start

    Actually, when the key was turned on (not cranking), the voltage did a quick spike (about 0.3 volts on a digital meter) and then dropped (and stayed) to zero immediately.
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    2001 Mustang Gt Will Not Start

    I checked the voltage coming into the cutoff switch in the trunk. The input line to the switch had no voltage even when cranking the car.
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    2001 Mustang Gt Will Not Start

    I checked the fuel line back to the fuel tank, dry. I checked voltage to the fuel pump from the shut off switch in the trunk. The shut off switch is not getting voltage under any conditions (key on; or key on and cranking). I checked the 2o Amp fuse under the hood for the fuel pump and the...
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    2001 Mustang Gt Will Not Start

    I checked for fuel just before the rails, nothing. I'm going to back track and find the issue. Thanks guys! I'll let you know what I find. Thanks!
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    2001 Mustang Gt Will Not Start

    The battery was dead so any old codes were erased. No new codes have been generated. I've double and triple check the manifold work. Torqued everything down to spec with new seal that came with manifold. I labelled the connectors to injectors and all vacuum lines so I wouldn't mix them up...
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    2001 Mustang Gt Will Not Start

    OBDII says I have fuel pressure, but I'll pop off the line just before the rails and check it like you suggested. I just had the rails off to do the intake so they shouldn't be clogged. I can pop them off too and check to make sure they have fuel flowing, easy enough. I'll check the buildup in...
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    2001 Mustang Gt Will Not Start

    I have a 2001 Mustang GT. Here is a brief history in case any of this sparks a thought with somebody. The car ran great most of the time ( 2 yrs ago). The car would sometimes start hard and run very poorly (lots of misfires and would not hold an idle) if it had rained or was raining. High...