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Old 11-10-2009, 06:35 PM   #1
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crazy idle issue 87 gta

Hi all
Im having a issue. no codes but when i get to stop like the idle goes up to around 1k, if i tap the gas a couple of times, it goes back down. I didnt see any broken or cracked hoses. Any help would be great. thanks for lookin
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Old 11-10-2009, 06:42 PM   #2
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Location: Tampa/New Hampshire
Posts: 777
Car: 91 camaro RS, 87 T/A
Engine: 350 TBI, 305 TPI
Transmission: 700r4
Axle/Gears: 4th Gen 3.42/BW 3.45

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Re: crazy idle issue 87 gta

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Originally Posted by TOM305T/A View Post
Hi all
Im having a issue. no codes but when i get to stop like the idle goes up to around 1k, if i tap the gas a couple of times, it goes back down. I didnt see any broken or cracked hoses. Any help would be great. thanks for lookin

first things first check and clean the IAC/TPS. Check out the technical faq link on this site for a how to, theres lots of info on common issues there.

heres a link with pictures also
http://www.iroczone.com/2009/10/adju...on-sensor-tps/
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Old 11-11-2009, 10:28 AM   #3
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Car: 1988 GTA
Engine: 305 tpi (LB9)
Transmission: WC T-5
Axle/Gears: 3.45 posi

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Re: crazy idle issue 87 gta

Yes this is most likely a problem with your iac or tps. However, the first thing you need to do is take your air intake off and clean the throttle plates and throttle body REALLY well. These get extremly dirty on tpi motors due to the location of the egr valve. Clean your throttle first, see what that does, and then check your tps voltage and remove and clean your iac valve. Good luck!
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Old 11-11-2009, 09:21 PM   #4
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Re: crazy idle issue 87 gta

ill start with cleaning the tb, thanks
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Old 11-11-2009, 09:21 PM
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