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2004 Ford F-150 Idling rough

Tiny
CLYDEDONOVAN
  • MEMBER
  • 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
Wednesday, March 5th, 2014 AT 5:33 AM

3 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 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
  • 4 POSTS
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
  • MECHANIC
  • 48,601 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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