High idle

2002 FORD WINDSTAR
190,000 MILES
Avatar
MBOB2772
  • MEMBER
  • 12 POSTS
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
Nov 21, 2012 at 1:11 AM
Advertisement
Avatar
CJ MEDEVAC
  • CERTIFIED EXPERT
  • 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
Images (Click to enlarge)
Attached Media
Attached Media
Nov 21, 2012 at 1:49 AM
Avatar
MBOB2772
  • MEMBER
  • 12 POSTS
We checked for vacuum leaks and everything checked out okay.
Nov 21, 2012 at 2:38 AM
Advertisement
Avatar
CJ MEDEVAC
  • CERTIFIED EXPERT
  • 11,004 POSTS
I would try the EGR valve.
Nov 21, 2012 at 3:04 AM
Avatar
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.
Nov 21, 2012 at 4:55 AM
Avatar
CJ MEDEVAC
  • CERTIFIED EXPERT
  • 11,004 POSTS
Use 2CarPros anytime, we are here to help. Please tell a friend.

Cheers
Images (Click to enlarge)
Attached Media
Attached Media
Attached Media
Attached Media
Attached Media
Attached Media
Attached Media
Nov 21, 2012 at 2:21 PM
Avatar
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?
Jun 28, 2018 at 10:36 PM
Avatar
BILLY GILDHOUSE JR
  • MEMBER
  • 6 POSTS
Any answers CJ Medevac?
Jul 1, 2018 at 4:54 PM
Avatar
RENEE L
  • CERTIFIED EXPERT
  • 1,260 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

Jul 2, 2018 at 11:22 AM