Fuel pump problems...
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o6S1D9e (10-03-2021)
02-16-2010, 10:33 PM
#12
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i back probed mine because i was having the same problem..i would get power at the pump but only when i was down there and never when i was starting it. watching the voltage fluctuate with the dmm hooked up and checking wires helped me narrow it down to a bad connection...check the ground connection as it was corroded just like my fpdm...once that was fixed voltage held constant around 5.5 while idling
03-02-2010, 10:33 AM
#13
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i just had this same prob, i had just filled the tank came home and was going to leave about two hours later with no start. Sucked about ten gals of fuel out droped the tank and replaced the pump. with no luck. Now i just called the dealer and they said the parts backorderd nationwide till may. idk what im goin to do
03-07-2010, 06:12 AM
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they told me the back order till may thing to but were able to find two units in Wisconsin and i got lucky and got one.....please check your fpdm before your fuel pumps eveyone..save money for sure
05-01-2011, 07:14 PM
#16
Thank you
This thread saved me a ton of money, just wanted to say thanks to all who posted, my truck died three days ago. 
Just going down the road and it was like i shut the key off. 
Because of this thread i changed out my FPDM and all was good, only cost about $85. Thanks again.
Just going down the road and it was like i shut the key off. Because of this thread i changed out my FPDM and all was good, only cost about $85. Thanks again.
09-06-2011, 06:30 PM
#17
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Hi, I have a 2004 F-150 5.4L Pickup and it broke down on me a couple days ago. I've narrowed it down to a fuel pump problem, thru checking relays and shutoff switch, etc. I've replaced the fuel pump and it's still not working. I checked the voltage and it's getting 12.4V to the pump. The truck will start, but wont take fuel and eventually shuts off. I'm lead to believe this may be a problem with either the Fuel Pump Driver Module or possibly even the Powertrain Control Module?? If anyone knows, is there any way I can check the FPDM without having to go buy one? Or does anyone have any suggestions at all, if Im perhaps way off here?
