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High idle

Tiny
MBOB2772
  • MEMBER
  • 2002 FORD WINDSTAR
  • 190,000 MILES
High idle problem. I had it scanned at a friends shop, and he said the IAC was bad and needed replaced. I did so, and the problem still persists. We checked for vacuum leaks and all are good. Even tried changing MAF, EGR, PCV and TPS and cleaned the throttle body. Now I have no codes, but it still idles high when I start it for about ten to twenty seconds, and also when driving when you take your foot off the gas it seems to continue to go for a few seconds. Also, if I unplug the IAC it runs and drives great, does not stall. I did notice that the new IAC has a spring and brass rod in it as the original did not is it possible that I need to get one from the dealer? I thought possibly the replacement IAC was defective so I took it back and exchanged it for another new one. Any help would be great.

Thanks
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Wednesday, November 21st, 2012 AT 1:11 AM

8 Replies

Tiny
CJ MEDEVAC
  • MECHANIC
  • 11,004 POSTS
Hello,

This sounds like you have a problem with the EGR valve not closing all the way. Here is a video to help you test it:

https://youtu.be/DqUCbbKdWf4

Here is the valve location (below).

Please let us know what happens.

Cheers
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Wednesday, November 21st, 2012 AT 1:49 AM
Tiny
MBOB2772
  • MEMBER
  • 12 POSTS
We checked for vacuum leaks and everything checked out okay.
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Wednesday, November 21st, 2012 AT 2:38 AM
Tiny
CJ MEDEVAC
  • MECHANIC
  • 11,004 POSTS
I would try the EGR valve.
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Wednesday, November 21st, 2012 AT 3:04 AM
Tiny
MBOB2772
  • MEMBER
  • 12 POSTS
I gave it a try and sure enough the valve was bad, good call. I did not think that would do it but I was wrong. I love this site.
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Wednesday, November 21st, 2012 AT 4:55 AM
Tiny
CJ MEDEVAC
  • MECHANIC
  • 11,004 POSTS
Use 2CarPros anytime, we are here to help. Please tell a friend.

Cheers
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Wednesday, November 21st, 2012 AT 2:21 PM
Tiny
BILLY GILDHOUSE JR
  • MEMBER
  • 6 POSTS
My 2000 Windstar has high idle when starting up the van. But the coil pack is new and had to put new coil connector plug in and with wires. Sometime it rattles the engine and act like it is jerking real bad. Speedometer and rpm gauge reading does not work and I have to hit the dashboard to get it all working again. Some say PCM relay or computer itself. I did new spark plugs and wires and all is replaced. I am going to try new EGR valve TMW. Hope it solves all. I did have a code before for a mas sensor so it is confusing. Any thoughts about fuses or anything?
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Thursday, June 28th, 2018 AT 10:36 PM
Tiny
BILLY GILDHOUSE JR
  • MEMBER
  • 6 POSTS
Any answers CJ Medevac?
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Sunday, July 1st, 2018 AT 4:54 PM
Tiny
RENEE L
  • ADMIN
  • 1,257 POSTS
Hello BILLY GILDHOUSE JR,

Thank you for using 2CarPros.com. This question thread is six years old please post your new question here: https://www.2carpros.com/questions/new
One of our experts will be happy to help you.

Kindest regards,

Renee
Admin

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Monday, July 2nd, 2018 AT 11:22 AM

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