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Need idle help

Discussion in '1987 -1993 Mustang GT' started by Saine5.0, Aug 27, 2018.

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  1. Saine5.0

    Saine5.0 New Member

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    My 89 gt is having issues idling. It idles rough and sputters when I start it, after driving a few minutes it clears up and idles good. After driving for a while (20-30 minutes) I notice it idles really fast. Any help is appreciated
     
    Lyl Toni likes this.
  2. Redtwilight

    Redtwilight Shinigami

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    Have you tried cleaning the Idle Air Control valve?
     
  3. Saine5.0

    Saine5.0 New Member

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    Not yet but I was thinking that would be my first step. Any advice to do it?
     
  4. Redtwilight

    Redtwilight Shinigami

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    It's pretty straight forward.
    Just unbolt the IAC, clean all the old gasket material off, then spray some carb cleaner inside. Give it a good shake to make sure it gets in all the ports good, dump, repeat a couple times, then empty it out. Make sure all the carb cleaner is out and the IAC is dry. Use a new gasket or RTV and reinstall.
     

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