2004 FORD F-150 IDLING ROUGH

  • Tiny
  • Clydedonovan
  • 2004 Ford F-150
  • 5.4L
  • V8
  • 4WD
  • automatic
  • 110,000 miles

My truck is rough once it warms up I change gas filter no change clean throttle body and put in the gas tank fuel injector cleaner still idling rough and there's no engine light on scan the computer no codes came up

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Wednesday, March 5th, 2014 AT 5:33 AM

3 Replies

  • Tiny
  • hmac300
  • Expert
  • 43,674 posts

Check the fuel pressure with a gauge autoparts rent it

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Wednesday, March 5th, 2014 AT 6:49 AM
  • Tiny
  • Clydedonovan
  • Member

I done fuel pressure 32 psi when in park the same drive position scan the truck it says everythink was ok no misfire anywhere but it still missing should I check every plug and coil separate to see the engine changes

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Friday, March 7th, 2014 AT 8:07 AM
  • Tiny
  • hmac300
  • Expert
  • 43,674 posts

Check for a vacuum leak first then do the coil thing but it may not make a difference. It cold also be an egr plugged or stuck open

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Friday, March 7th, 2014 AT 1:52 PM

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