Mechanics

99 GRAND AM 2.4L IDLE FLUCTUATING AND BOGGING

1999 All Other Makes All Other Models

I have a 99 grand am and we just put a used engine in. I used all of my original stock accessories on the new engine such as, Intake manifold, exhaust manifold, throttle body etc.. We started the engine and it began to idle between 2000 rpms and 3500 rpms like someone was giving it gas and letting off and I am not getting any engine codes. I changed the Idle control valve, throttle position sensor, map sensor and also checked the engine grounds. I was told to drive it at least 8 miles to reset the idle control valve, didnt work. I checked for vaccuum leaks and didnt find any. PLEASE HELP! I am begging. Please, Help me out guys. :
Thank you,
Jaymz
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Phat99gd
April 6, 2006.




Well I got the problem figured out, it was a bad intake manifold gasket, got it replaced and back to normal.

Tiny
Phat99gd
Apr 16, 2006.


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