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Thread: Crazy idle help

  1. 06-09-2009, 10:50 PM #1
    89 vert
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    Crazy idle help

    Hi all, I have a 89 gt with a crazy idle problem. The idle is up around 1400 untill i am at 3-4 mph or under. If I am in traffic going 5 mph or above its like the cruise control is on(which I dont have) I have cleanned the iac then replaced it. I cleanned the mass air. I disconnected the battery each nite untill the next day. I removed the air cleaner from the fender well to the engine bay. It does it with the fan on or off. If I am cruisin at any speed and push the clutch in it stays at 1400 untill i stop. I sprayed all vac lines with carb cleaner. I am pulling out what little hair I have. Anyone have any ideas?? Thanks


    MSD ignition/King Cobra clutch/Polished Cobra upper and lower/Ported GT40p w RR/ 70mm tb/ 24 lb injectors/ pullies/ Mac cold air/ Mac long tubes/ H pipe/ 3:73 gears/ 3g alt/ welded sub frames/ Alum driveshaft/ CC plates/125 shot of juice/custom trunk/suspension goodies.
    FIRST PLACE 87-93 FOX BODY BUCKEYE STANGS SHOW 2010 AT SUMMIT RACING
    283 hp / 320 tq on mustang dyno (all motor)
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  2. 06-10-2009, 06:57 AM #2
    89 vert
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    Ttt.


    MSD ignition/King Cobra clutch/Polished Cobra upper and lower/Ported GT40p w RR/ 70mm tb/ 24 lb injectors/ pullies/ Mac cold air/ Mac long tubes/ H pipe/ 3:73 gears/ 3g alt/ welded sub frames/ Alum driveshaft/ CC plates/125 shot of juice/custom trunk/suspension goodies.
    FIRST PLACE 87-93 FOX BODY BUCKEYE STANGS SHOW 2010 AT SUMMIT RACING
    283 hp / 320 tq on mustang dyno (all motor)
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  3. 06-10-2009, 08:24 AM #3
    John4cam
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    Tps?
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  4. 06-10-2009, 03:15 PM #4
    89 vert
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    The tps has around 500 miles on it, I will recheck the voltage today to be sure, Thanks


    MSD ignition/King Cobra clutch/Polished Cobra upper and lower/Ported GT40p w RR/ 70mm tb/ 24 lb injectors/ pullies/ Mac cold air/ Mac long tubes/ H pipe/ 3:73 gears/ 3g alt/ welded sub frames/ Alum driveshaft/ CC plates/125 shot of juice/custom trunk/suspension goodies.
    FIRST PLACE 87-93 FOX BODY BUCKEYE STANGS SHOW 2010 AT SUMMIT RACING
    283 hp / 320 tq on mustang dyno (all motor)
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  5. 06-10-2009, 03:17 PM #5
    Rodeheaver's
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    I think it still has to do with air blowing around the mass air meter, of something along those lines...
    2015 A6 Mustang GT that so far has gone 9.48@147 but still the fastest prochargerd S550 in the world aside from Tim Essick's!
    www.Rodeheavershotrod.com
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  6. 06-10-2009, 04:02 PM #6
    White5.0
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    Quote Originally Posted by 89 vert View Post
    The tps has around 500 miles on it, I will recheck the voltage today to be sure, Thanks

    reset the base idle THEN check TPS voltage. dont just check tps volts cause if your base idle is way off your car will act up
    2013 Mustang GT
    1987 Mustang GT
    1999 Contour SVT
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  7. 06-10-2009, 06:55 PM #7
    mustang mark
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    do u have a fuel pressure regulator on car?adjustible
    Last edited by mustang mark; 06-10-2009 at 07:05 PM.
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