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    Thread: Idle issue

    1. 09-18-2009, 04:03 PM #1
      Turbo94Ranger
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      Default Idle issue

      I just noticed a weird Idling issue. At a redlight, stop sign, etc, the car will idle at 500-1000rpms... Like back and forth... It sounds like its going to die, but right before it does, it kicks back up to 1000-1200rpms. It doesn't do it at initial start up. Even if i let it sit for a while, at idle. Any ideas as to what causes this and how to repair it?

      It's an 86 Mustang gt/lx. Basically stock, The only engine modification is a fender mount intake. Only has 73,000 miles on it. Any ideas? Thanks guys.
      86 GT/LX Fox Convertible
      94 2.3T Ranger
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    2. 09-18-2009, 04:13 PM #2
      86capriASC
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      Could by a dirty Idle air control. Take it off the throttle body and clean it out with carb cleaner.
      Mike

      1986 ASCMclaren #108
      stock short block, Victor EFI, 75mm TB, 3.08's, Borla cat-back, slot style MAF conversion, Gt-40p heads, TFS1 cam, 80lb injectors, 69mm turbo, Moates Quaterhorse, E85. 501/584 @ the rear wheels
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    3. 09-18-2009, 05:10 PM #3
      allenpul
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      dirty MAF will do it too...
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    4. 09-18-2009, 08:56 PM #4
      TheWizard
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      Exclamation

      Quote Originally Posted by allenpul View Post
      dirty MAF will do it too...
      No MAF in '86 allenpul

      It sounds like the TPS to me.
      Original Member of 'The Anti-Cowl Hood Club' and 'The Ten-Hole Mafia'.
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    5. 09-18-2009, 10:34 PM #5
      allenpul
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      hey my 86 has one LOL
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    6. 09-18-2009, 11:10 PM #6
      83GTRAG
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      sounds like you need a distributor cap and rotor.. mechanic 101 here
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    7. 09-19-2009, 11:49 PM #7
      Turbo94Ranger
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      Cap/rotor is next on the list. Thanks guys. I'm also in the process of gathering my parts for the MAF conversion....

      I cleaned the IAC but haven't had a chance to drive it again. It's intermittent so I can't really pinpoint it.
      86 GT/LX Fox Convertible
      94 2.3T Ranger
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    8. 09-20-2009, 12:14 AM #8
      scoutdrivinrebel
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      Default

      Quote Originally Posted by 86capriASC View Post
      Could by a dirty Idle air control. Take it off the throttle body and clean it out with carb cleaner.
      My coupe does the same thing sometimes. Glad I saw this thread for a reminder. I've been meaning to clean the IAC for a while now.
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