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03 Mustang Gt Stopping Poroblem

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03 Mustang Gt Stopping Poroblem

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Old 07-13-2018, 02:11 PM
  #1  
Bwoodson
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Default 03 Mustang Gt Stopping Poroblem

My 03 Gt has recently decided to lose its mind. I replaced the IAC to fix an idling problem but not it wants to hang at 1500 rpm when iím stopping and will not let off until itís completely stopped (sometimes easier said than done) and when its stopped, it jumps down to 400 and almost dies out. Iíve looked through a few posts and havenít seen much like it in an automatic car. Iíve checked for vacuum leaks and nothing came up. A few guys at work thought my throttle cable was hung until i let them drive. Seriously need help on this one. Thanks in advance
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Old 07-13-2018, 02:43 PM
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TRamsdell
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This nonsense didn't happen before changing the IAC valve?
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Old 07-13-2018, 02:52 PM
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Bwoodson
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Originally Posted by TRamsdell View Post
This nonsense didn't happen before changing the IAC valve?
No, it had a horrible idle but it never dod this. It did it right after i out it on and it almost sent me into an intersection. I thiught it was my TPS but after 3 of those, i’m at a loss
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Old 07-13-2018, 03:10 PM
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kast1376
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Originally Posted by Bwoodson View Post
No, it had a horrible idle but it never dod this. It did it right after i out it on and it almost sent me into an intersection. I thiught it was my TPS but after 3 of those, iím at a loss
Clean your original, and reinstall. See if it isn't better. In my experience the aftermarket nonford IACs are garbage.
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Old 07-13-2018, 03:29 PM
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Bwoodson
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The original was stuck wide open. I tried everything from cleaning it to taking it apart and it would not budge
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Old 07-13-2018, 05:19 PM
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99GTvert
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Damn. Moving to tech..
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Old 07-13-2018, 05:43 PM
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WJL
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+++^ KAST1376 has a great point, just because its new doesn't meant it works.

There are a couple post on here where someone had to return it three times before getting one that worked I think it was Tadpole or something like that
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Old 07-13-2018, 08:26 PM
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1slow67
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The hanging idle is supposed to happen but the nearly dieing part isnt.
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Old 07-13-2018, 10:03 PM
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Urambo Tauro
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You can confirm whether the IAC is good with a resistance check (engine off). The IAC should have something like 6-13 ohms between the pins, IIRC.
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