4.6 wont idle
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Joined: Jan 2009
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4.6 wont idle
I have a 05 with f-150 stx with the 4.6, 56,000 miles, have been having trouble with the truck running rough then stalling, have had the fuel pump out and had it checked nothing was wrong with it from what my dealer told me, also have changed the fuel pump driver module which was cracked, no change, as long as my foots on the gas it runs fine, stop at a red light or let off real quick it just dies, i have no check engine light or any codes...yet...i think it may be the pump but havent been able to check pressure yet...anyone have suggestions?
Senior User
Joined: Apr 2006
Posts: 152
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Also sounds like it could be the IAC - Idle Air Control solenoid. Fords have a problem with this blasted thing. Same symptoms on my `99 Expy and it was this. Piece of cake to replace yourself on that truck. I assume it's still easy to change - it looks that way on my `07 150 anyway. On mine, you could whack the IAC with the butt of a screwdriver and it would be ok for a short while.
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