Question about 2004 Ford F150

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1994 ford f150 suddenly goes into a high idle.

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  • 227 Answers

Just an F150? no further information......... I'll give it a shot.

Possable causes

Bad power steering pressure sensor
Bad IAC Circuit
Intermittent Vaccume leak (V8's have this issue with the PCV tubing)
Floor mat stuck over throttle :P

Posted on Oct 23, 2013

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Posted on Jan 02, 2017

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  • 6 Answers

SOURCE: Idles bad

Sounds like you may have an upper intake manifold leak. Typically the gasket between the Plenum and the lower intake dries up and gets sucked into the intake a little causing a leak and a high idle issue. The repair requires the removal of the plenum and replacement of the gasket. NOTE: there is a torx bolt hidden between the center plenum runners and can only be seen by looking straight down at the top of the plenum and it may be covered in dirt. If you have to use a bar to pry off the plenum you probably have missed a bolt. Typically it is the one noted above. Best of luck.

Posted on Mar 22, 2009

  • 420 Answers

SOURCE: 2001 FORD F150 ENGINE SURGES AND DIES AT IDLE

Check all of your vacume lines. If it isn't a vacume line it is most likely the O2 sensor.

Posted on Apr 16, 2009

  • 1 Answer

SOURCE: engine idles high for a little over a minite then dies

Clean your MAF sensor and see if that works.

Posted on May 21, 2009

  • 636 Answers

SOURCE: 1987 ford ranger idled too high

Try lubricating the throttle body cable , sounds like it is sticking.

Posted on Jul 26, 2009

  • 1206 Answers

SOURCE: 91 ford f-150 5.0 idle has suddenly went irregular

check fuel pressure regulator .

Posted on Jan 15, 2010

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1 Answer

How to adjust the idle on 1998 f150


idle air control valve could be bad out the box exchange it for another one and see if problem goes away.

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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.

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So you are saying for the most part that it won't idle until it gets warm? Sounds like the idle speed control motor is bad.

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Check your throttle body, for the throttle plate sticking.  Also check for a vacuum leak.

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Check your Idle Air Control Valve (IAC) to see if it's working ok, and set your idle hard stop.

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1 Answer

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1991 ford f150


our idle air control is lazy the round sensor with 2 wire that goes on it it on the air intake try clean the throttle body with a good air intake cleaner hope it help FIXYA OUR POST THANKS PIERRE

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