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Starts, but won't run

2004 - 2008 F-150

Starts, but won't run

  #1  
Old 04-29-2018, 04:27 PM
FX-4 Man's Avatar
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Starts, but won't run

Filled up with E-15 at a Sheetz here in Manassas on Friday, drove the 6 miles home and parked my truck.
Next morning (Saturday), she'd start, run for a little, then sputter and die. If I gave her any throttle, she'd die almost immediately.
Tried to start her again (during the same 5 minutes) only to have the starter spin and not catch.
A few hours later, she'd start but not run long enough to even move the truck.

My master mechanic brother says it's water in the fuel, the first thing that crossed my mind was the FPDM gone bad, although I dropped the spare, crawled under my truck to inspect the FPDM for cracks, etc. in the body of the module that would let water in, not seeing any, I'm at a loss.
Could the FPDM go bad without cracks letting water in?
I've already purchased a new FPDM just in case, damn thing cost me $102 and change from NAPA (upside is, I can take it back if it's not been installed).

My 2005 has a little better than 138,000 miles and this is the first problem I've had with it not starting.

Any help would be greatly appreciated...thanks ahead of time.
 

Last edited by FX-4 Man; 04-29-2018 at 04:38 PM.
  #2  
Old 04-29-2018, 04:59 PM
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With all the ruckus with bad fuel lately, it might be.

I'd drain some of that fuel, and put it in a glass and see what it looks like. Maybe even try it in a small engine, like a lawn mower. If you try it in the lawn mower and it don't crank, you'll know it's bad fuel.
 
  #3  
Old 04-30-2018, 11:30 AM
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Originally Posted by ManualF150 View Post
With all the ruckus with bad fuel lately, it might be.

I'd drain some of that fuel, and put it in a glass and see what it looks like. Maybe even try it in a small engine, like a lawn mower. If you try it in the lawn mower and it don't crank, you'll know it's bad fuel.
Found it's not bad fuel, turns out the FPDM and thereby the fuel pump weren't getting power or a signal from the computer, and because of how Ford wires the relay through a circuit board, he can't even run a hot lead from the relay to the FPDM. He keeps saying that Ford engineers hate their mechanics.
I may just end up having to tow her to Ted Britt Ford in Fairfax and let them fix the problem (which'll likely include my having to buy a $300.00 fuel pump, etc) .
 
  #4  
Old 05-14-2018, 09:16 PM
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Problem turned out to be both a bad FPDM and a bad connection at the same time...what are the odds?
 
  #5  
Old 05-14-2018, 09:20 PM
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Odds are odds.. at least you got it figured out.
 
  #6  
Old 05-14-2018, 10:12 PM
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Originally Posted by FX-4 Man View Post
Problem turned out to be both a bad FPDM and a bad connection at the same time...what are the odds?
Thanks for letting us know.
 
  #7  
Old 05-15-2018, 05:27 PM
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Originally Posted by Roadie View Post
Thanks for letting us know.
[as Yoda] Mmmm, welcome you are young Padawan.
 


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