2003-04 Mach 1 Registry Owners Club - View Single Post - Possible Fuel Pump or Fuel Pump Driver Module Issue

03mach69mach · 11-06-2020, 10:55 AM

Yes, they have the inertia switch. But I believe it is situated before the Fuel Pump Driver Module. And that's why the Ford Service diagnostic has you measure voltage on two pins in the connector. With key on, they say you should have 10.9 volts or more. If yes, key off and replace FPDM.

Part of me thinks that there is nothing wrong with the FPDM but the new one didn't solve the issue.

11-06-2020, 10:55 AM	#3
03mach69mach Ford Guy Join Date: Feb 2003 Location: Knoxville TN Posts: 1,406	Re: Possible Fuel Pump or Fuel Pump Driver Module Issue Yes, they have the inertia switch. But I believe it is situated before the Fuel Pump Driver Module. And that's why the Ford Service diagnostic has you measure voltage on two pins in the connector. With key on, they say you should have 10.9 volts or more. If yes, key off and replace FPDM. Part of me thinks that there is nothing wrong with the FPDM but the new one didn't solve the issue. __________________ Mark Blountville TN 1969 Winter Blue Mach 1 428CJ 1988 White LX 5.0 Convertible SOLD 2000 White Taurus SE 3.0 SOLD 2001 BMW 330i SOLD 2002 Harley F150 5.4 Supercharged 2003 Azure Blue Mach 1 4.6 DOHC 2003 Lincoln Town Car 4.6 SOHC 2011 Infiniti G37xS 3.7 DOHC