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2004 Ford Truck Engine speed fluctuates when cold

Tiny
JAMES BENNETT
  • MEMBER
  • 2004 FORD TRUCK
  • 6 CYL
  • 2WD
  • MANUAL
  • 94,000 MILES
The engine speed when cold fluctuates until it warms up then it idles fine. What do you think could be the problem? I have replaced the plugs fuel and air filters. I have also noticed that at the end of summer the idle speed did not kick up all the time when I turned the A/C on. Is it possibly related? Any assistance would be appreciated. Thanks, Jim.
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Friday, December 12th, 2008 AT 3:23 PM

1 Reply

Tiny
MIKE H R
  • MECHANIC
  • 3,094 POSTS
I would start with checking the throttle positoning sensor. Have you had it scanned? If you did and it comes upw ith a po123, po222, po223, po122, these codes are desiginated to the tps. That would cause the difference with the ideling.

I would have it scanned for trouble codes.
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Tuesday, December 16th, 2008 AT 8:12 PM

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