Question about 2004 Ford F150

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Rpms goes up amd down when tuck is in park idling 2004fordf150

2004 ford f150




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Hello and welcome to FixYa!,

It sounds like a Short Circuit somewhere in the wiring and Fuses!

Your best option is to Take it to a Car Dealer and have them check it out for you!

Hope this helps -P3NGYJ03

Posted on Jan 15, 2009

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There is short in the wiring which cause this kind of variations ,please fuse and wiring in the car .....



Good luck...

Posted on Jan 15, 2009

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Welcome to Fixya! Have you checked the Distributor cap and Plug wires????

Posted on Jan 15, 2009

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1 Answer

Is the idle air control the only thing that affects the idle when in park?


replace the iac with a new one . fords IAC units go bad.
the only other is plate clearance if you have not touched it DON'T
just get a new IAC not a junkyard one ....NEW.
past that you get into vacuum leaks and computer and wiring problems and a bunch of places you do not want to go .

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1 Answer

I have a 1988 F150 with a 302, the truck has a hard time finding a Idle


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I have 1990 ford f150 5.8 liter it idles high when in park and idles about 1200 rpm when in gear and sometimes surges up and down. i have clean the idle control and check showing 12.5 ohms still won&#


One common problem is a vac leak or a sticking throttle plate.
The computer controls idle speed by how much air is allowed into the intake. The idle control valve could be sticking even tho you have cleaned it, or have a faulty motor.

Sep 12, 2012 | 1990 Ford F150

1 Answer

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Mar 01, 2012 | 1990 Ford F150

1 Answer

I want to adjust the idle on a 2003 ford f150


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When its warmed up, in park or in gear, RPMs are about 600-650 at warm idle. At cold its about 850 or so, Good luck and thank you for using Fixya

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1 Answer

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sounds like exhaust system is grouding against the frame

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1992 ford f150 Idle hunting


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Jan 26, 2009 | 1989 Ford F 150

1 Answer

1999 F150, 6 cyl.


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Nov 11, 2008 | 1999 Ford F150 Regular Cab

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