How do you know if the Idle Air Control Valve is going bad?


Asked by Aug 03, 2014 at 04:20 PM about the 1987 Ford F-250

Question type: Maintenance & Repair

5 Answers


Low or rough idle. Stalling when slowing to stop. But runs normally at highway speeds. Turn ac on-- does vehicle idle up. If not possibly dirty/faulty idle air control valve or dirty throttle plate.

2 people found this helpful.

It has been doing this since I tuned the engine. Checked auto parts store and a new one is about $60.00...they recommend a new replacement and not to try and clean the old one.


Honestly that's rather cheap compared to some. I would try cleaning first. But then again it's twenty seven years old. Personal experience with one in my 1985 z28. Took it off, cleaned it and then turned key on so I could see if the plunger moved. Damn thing (plunger) shot across the shed. Lol. Had to buy a new one anyway.


Replaced the air control valve today and the truck is running much better. Thanks for all the feedback folks!


Glad you got it going. Drive safe.

Your Answer


Looking for a Used F-250 in your area?

CarGurus has 422 nationwide F-250 listings starting at $4,995.


Ford F-250 Experts

  • #1
  • #2
  • #3
View All

Related Models For Sale

Used Ford F-150
2,334 Great Deals out of 215,121 listings starting at $1,300
Used Ford F-350
224 listings starting at $8,999
Used GMC Sierra 1500
720 Great Deals out of 58,939 listings starting at $1,995
Used GMC Sierra 2500
3 Great Deals out of 156 listings starting at $4,800
Used Ford Mustang
256 Great Deals out of 36,837 listings starting at $2,500

Used Cars For Sale

1999 Ford F-250 For Sale
25 listings starting at $5,995
1996 Ford F-250 For Sale
61 listings starting at $4,995

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.