F150online Forums - Changed fpdm, still idles rough and stalls when warm what do i do

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Ktkford

08-11-2018 06:09 PM

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?

ManualF150

08-11-2018 06:16 PM

If it's running that bad, get the OBD codes read. Betcha there is a pending code.

Roadie

08-11-2018 08:37 PM

You could spend a fortune shotgunning it. Get it diagnosed.

Patman

08-12-2018 11:28 AM

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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