Erratic Idle, Help Please.

Discussion in 'Fox 5.0 Mustang Tech' started by Cory Berg, Sep 30, 2012.

  1. Cory Berg

    Cory Berg Active Member

    Sep 26, 2012
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    One question for the techies, my idle is a bit erratic. It likes to stick high, around 1,500 rpm. And sometimes it wants to drop to 500 rpm and stall out. Easy fix?
  2. jrichker

    jrichker StangNet's favorite TOOL SN Certified Technician Founding Member

    Mar 10, 2000
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    Your post needs to go in 5.0 Tech. Untill that happens, here's some help...

    See the "Surging Idle Checklist” for help with all your idle/stall problems. You can guess at the problem and throw parts at it, or you can use the checklist to help you find the problem quickly and inexpensively. The checklist is right here in the Stangnet 5.0 Tech forum and you don’t have navigate to some other unknown web site. It‘s free and doesn’t cost anything: at last count there were more than 103,000 visits and still climbing

    The quick and easy way to dump the codes is in there too, and all you need to do it is a paper clip! The first two posts contain all the fixes & updates. At last count there were 24 possible causes and fixes for surging idle/stall problems. I continue to update it as more people post fixes or ask questions.
  3. Taino

    Taino Member

    Nov 30, 1999
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    I've ran into this and followed Jrichker sticky he sent me. In my case It was the throttle body needed cleaning. Since then Ive replaced the IAB and the TPS, they were the originals from 1990. Not saying to change them out but they are not expensive pieces and WTH might as well. Also check for vacuum leaks, those are annoying, simple fixs but finding them is the issue. Anyways, my stang is running well now, hope you solve your issue.

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