Thread: 1998 GTP will not idle cold and revs to 1500rpm by itself when warm.

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  1. #1 Re: 1998 GTP will not idle cold and revs to 1500rpm by itself when warm. 
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    Thanks for your help and support. Pulled the throttle body and cleaned it with throttle body solvent.Pulled the idle air motor out of throttle body and cleaned it good.Put it all back together.The car fired right up and no sevice engine light.Did a good test drive and all is well. no idle problems or reving up or surging. PS, there was a medium amount of black residue on the engine side of the throttle body and the throttle plate and the mechanism for the idle air motor, the cleaner worked good,Have a great day!
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  2. #2 Re: 1998 GTP will not idle cold and revs to 1500rpm by itself when warm. 
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    Quote Originally Posted by flyerboy101 View Post
    PS, there was a medium amount of black residue on the engine side of the throttle body and the throttle plate and the mechanism for the idle air motor...
    Glad you got it cleaned up and back to working well. Just so you know tho, it will get black again and buildup is *almost* always going to happen. The reason being the EGR system dumps exhaust gases full of carbon back into the intake just after the throttle body. The carbon gets everywhere inside and will build back up as long as the EGR is still hooked up. You will just have to keep an eye on it and clean it again if the problem re-occurs.
    It will take a while to build up, usually a couple years, but it will happen again. Just so you know.

    Again, glad you got it fixed!!!

    Quote Originally Posted by AmericanSoldier View Post
    ...not scanning/monitoring your motor is like bangin a hooker and you just HOPE your not infected.
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