F-150 runs rough

Tiny
PB WHITE
  • MEMBER
  • 2001 FORD F-150
  • V8
  • 4WD
  • AUTOMATIC
  • 86,000 MILES
2001 Ford F150 Ext cab with 5.4L v8, 86,000 miles
When starting after not using over the weekend, engine runs very rough and vibrates.
It will eventually smooth out after revving in Park. When put into drive rough engine vibration returns.
Driving for a few miles and it seems ok. Seems to increase also when damp or left out in rain.
Driving every day it doesn' happen. I have been adding gas treatment and injector cleaner alternately to each fill-up for several months.
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Wednesday, April 13th, 2011 AT 3:50 PM

5 Replies

Tiny
WRENCHTECH
  • EXPERT
Is the check engine light coming on at all?
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Wednesday, April 13th, 2011 AT 4:38 PM
Tiny
PB WHITE
  • MEMBER
No it does not
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Wednesday, April 13th, 2011 AT 4:42 PM
Tiny
WRENCHTECH
  • EXPERT
It's probably been disabled. You should start out by scanning for any stored trouble codes.
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Wednesday, April 13th, 2011 AT 4:44 PM
Tiny
PB WHITE
  • MEMBER
Now that I think about it the check engine light did come earlier this year when it was worse. I had not driven the truck for 2 weeks. It eventually went off a day or 2 after it started running smooth.
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Wednesday, April 13th, 2011 AT 4:47 PM
Tiny
WRENCHTECH
  • EXPERT
Closing question
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-1
Thursday, June 30th, 2011 AT 11:25 PM

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