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Changed fpdm, still idles rough and stalls when warm what do i do

2004 - 2008 F-150

Changed fpdm, still idles rough and stalls when warm what do i do

  #1  
Old 08-11-2018, 07:09 PM
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Join Date: Aug 2018
Posts: 1
Changed fpdm, still idles rough and stalls when warm what do i do

I got a 2004 5.4 and the damn thing stalls and idles rough when it gets warm. Was thinking fuel pump but now am thinking everything from vac lines to cleaning throttle body. Should i just do it all or anybody have any suggestions to start narrowing things down?
 
  #2  
Old 08-11-2018, 07:16 PM
Technical Article Contributor
Join Date: Jan 2007
Location: Vernon, NY
Posts: 8,228
If it's running that bad, get the OBD codes read. Betcha there is a pending code.
 
  #3  
Old 08-11-2018, 09:37 PM
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Join Date: Jan 2002
Location: Wilmington,NC
Posts: 4,431
You could spend a fortune shotgunning it. Get it diagnosed.
 
  #4  
Old 08-12-2018, 12:28 PM
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Join Date: Aug 2005
Location: DFW
Posts: 20,693
how does it act on hot restart?

I agree you need to spend some time or money and get it properly diagnosed. Nothing worse than spending money replacing perfectly good parts
 


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