Fuel pump not working

Big Rob · January 22nd, 2012, 10:17 AM

Ok,

Car died out on me on Thursday, had a mechanic look at it. Told me it was the fuel pump. I bought a new pump at Advanced Auto Parts, dropped the tank swapped it out, but nothing. I went back in the tank and I couldn't here it turning on when i turned over the ignition.

Checked the fuse in the engine bay, it was good. Got a pen light volt tester thing and it apparently the tank was getting power, I don't know how much voltage but there was something. I took the pump back out and connected it directly to the car's battery and it worked. No clue as to what to do next. Help plz

Big Rob · January 22nd, 2012, 10:21 AM

Would the Constant Control Relay Module have anything to do with this? I had my AC stop working a little while ago and I think it was due to it blowing a fuse there. And throughout December my car did hesitate here and there to start so maybe it was an ongoing thing

dhicks7806 · January 22nd, 2012, 10:46 AM

Did you check the inertia shut off switch in the trunk? It's a little black box by the drivers tail light with a red button in it looking down from the top...button should be pressed down- then I would say to check the fpdm- mine had a hot ground and was doublin the voltage to the pump- I had 90psi base fuel pressure!

Sent from my Autoguide iPhone app

Big Rob · January 22nd, 2012, 10:56 AM

Yeah I checked the Inertia switch. What's the FPDM, where is it located?

dhicks7806 · January 22nd, 2012, 12:06 PM

Originally Posted by Big Rob

Yeah I checked the Inertia switch. What's the FPDM, where is it located?

Fuel Pump Driver Module - Basically it supplies and controls power to your fuel pump. It is located in the trunk behind the carpet paneling on the left. It is a about 3x3 with one plug connected to it. Try pulling the connector off and using some contact cleaner on the pins/sockets. There is also a way to test it with a multimeter, but im not sure exactly which pins to check...google it

I know that if the fpdm is getting more than 10.5 volts coming in and the pump is not receiving said voltage, the fpdm is bad.

bulloch27 · January 22nd, 2012, 12:16 PM

Originally Posted by dhicks7806

Fuel Pump Driver Module - Basically it supplies and controls power to your fuel pump. It is located in the trunk behind the carpet paneling on the left. It is a about 3x3 with one plug connected to it. Try pulling the connector off and using some contact cleaner on the pins/sockets. There is also a way to test it with a multimeter, but im not sure exactly which pins to check...google it I know that if the fpdm is getting more than 10.5 volts coming in and the pump is not receiving said voltage, the fpdm is bad.

9 out of 10 the FPDM committed suicide.

Big Rob · January 22nd, 2012, 06:55 PM

Sounds good I'll look into this tomorrow, thanks guys

Big Rob · January 29th, 2012, 04:55 PM

It was the FPDM, thanks again guys

dhicks7806 · January 29th, 2012, 05:30 PM

No problem, happy to help! Reps? :shifteyes and what did you pay for a new one? If you don't mind...

Sent from my Autoguide iPhone app

Big Rob · January 29th, 2012, 06:12 PM

Originally Posted by dhicks7806

No problem, happy to help! Reps? :shifteyes and what did you pay for a new one? If you don't mind...

Sent from my Autoguide iPhone app

I got a used one for $65 off of some dude on Craigslist. I don't really know how much they run for and it was the most convenient. However, some of the cables in the fuel pump assembly were holding onto dear life by a thread so I ended up changing the entire assembly which cost $230 I believe. Sucked, I had to take that away from the money I had saved for a blower

tyzride · January 29th, 2012, 06:56 PM

Sorry to hear about replacing the entire module. At least you found out the cause of the problem and got it resolved.

January 22nd, 2012, 10:17 AM	#1
Big Rob Regular 02 Mustang GT Join Date: Oct 2009 Location: Miami, FL Posts: 296 iTrader: 0 reviews	Fuel pump not working Ok, Car died out on me on Thursday, had a mechanic look at it. Told me it was the fuel pump. I bought a new pump at Advanced Auto Parts, dropped the tank swapped it out, but nothing. I went back in the tank and I couldn't here it turning on when i turned over the ignition. Checked the fuse in the engine bay, it was good. Got a pen light volt tester thing and it apparently the tank was getting power, I don't know how much voltage but there was something. I took the pump back out and connected it directly to the car's battery and it worked. No clue as to what to do next. Help plz __________________

January 22nd, 2012, 10:21 AM	#2
Big Rob Regular 02 Mustang GT Join Date: Oct 2009 Location: Miami, FL Posts: 296 iTrader: 0 reviews	Would the Constant Control Relay Module have anything to do with this? I had my AC stop working a little while ago and I think it was due to it blowing a fuse there. And throughout December my car did hesitate here and there to start so maybe it was an ongoing thing __________________

January 22nd, 2012, 10:46 AM	#3
dhicks7806 Regular 2003 Mustang GT Join Date: Dec 2011 Location: Palmerton PA Posts: 252 iTrader: 0 reviews	Did you check the inertia shut off switch in the trunk? It's a little black box by the drivers tail light with a red button in it looking down from the top...button should be pressed down- then I would say to check the fpdm- mine had a hot ground and was doublin the voltage to the pump- I had 90psi base fuel pressure! Sent from my Autoguide iPhone app __________________ '03 GT w/BBK CAI, MAC Pro chamber, Borla Stingers, MGW Orange, SCT X3, and some make it sexy mods '89 GT 5.0 w/full bolt ons-SOLD '04 STi w/ A'pexi N1 catback and accessport-SOLD '00 Audi A6 2.7t stock - DD/Wifey's whip

January 22nd, 2012, 10:56 AM	#4
Big Rob Regular 02 Mustang GT Join Date: Oct 2009 Location: Miami, FL Posts: 296 iTrader: 0 reviews	Yeah I checked the Inertia switch. What's the FPDM, where is it located? __________________

January 22nd, 2012, 06:55 PM	#7
Big Rob Regular 02 Mustang GT Join Date: Oct 2009 Location: Miami, FL Posts: 296 iTrader: 0 reviews	Sounds good I'll look into this tomorrow, thanks guys __________________

January 29th, 2012, 04:55 PM	#8
Big Rob Regular 02 Mustang GT Join Date: Oct 2009 Location: Miami, FL Posts: 296 iTrader: 0 reviews	It was the FPDM, thanks again guys __________________

January 29th, 2012, 05:30 PM	#9
dhicks7806 Regular 2003 Mustang GT Join Date: Dec 2011 Location: Palmerton PA Posts: 252 iTrader: 0 reviews	No problem, happy to help! Reps? :shifteyes and what did you pay for a new one? If you don't mind... Sent from my Autoguide iPhone app __________________ '03 GT w/BBK CAI, MAC Pro chamber, Borla Stingers, MGW Orange, SCT X3, and some make it sexy mods '89 GT 5.0 w/full bolt ons-SOLD '04 STi w/ A'pexi N1 catback and accessport-SOLD '00 Audi A6 2.7t stock - DD/Wifey's whip

January 29th, 2012, 06:56 PM	#11
tyzride Regular 2002 Saleen S281-SC Join Date: May 2008 Location: Boise, ID Posts: 129 iTrader: 0 reviews	Sorry to hear about replacing the entire module. At least you found out the cause of the problem and got it resolved.

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