Sometimes when my car is warm and I go to restart it it races up to 2000 RPM and sits there for a bit...it then slowly comes down after a couple seconds. What gives? IAC motor is clean..should I slap a new one in there? I just want this thing to run as smooth as possible....

POS is what it is....

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89 GTA G92
305 TPI WC 5spd w/3.45
Accel Cap & 8mm Taylor's
Custom 4" Cold Air Induction
Jet Airfoil
K&N Airfilter
160 deg stat/fan switch TB Bypass - Steel Rad
Cat back 3" Exhaust w/Terminator Muff.
HiGh FlOw Dynomax Cat
Spohn LCA's - KYB GR-2's
Moroso Crank Bolt and roller pilot bearing.
Autometer Vac+Oil Temp

 

EXACT same thing happens to me. What gives?

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http://www.tcnj.edu/~esposit3

• '89 Trans AM, 305 TPI, 5-spd
• '86 Firebird, 2.8, Auto

 

I also have the same exact problemand my IAC is clean.I figured im redoing the car anyways so im just gona replace the IAC and then see what happens.But it would be nice to know whats exactly causing this problem,im wondering if my IAC is just bad.

Check out My Trans Am:
http://hometown.aol.com/italianknight178/index.html

 

Glad to see I'm not alone...anyone else?

 

I have the same problem...my friend's '89 IROC has the same problem...my mother's '88 5.7L GTA has the same problem...another friend's '89 has the same problem...JC, what gives? I think it has something to do with temp, run time, IAC and ECM speed. I dunno, I'll hope this problem goes away with my new motor...

 

I have a theory...mine only does this in wormer (+65*'s temp) weather, never when colder it seems.

I'll plug in my scanner tomorrow.

Don't go replacing parts just yet, mines done it since about 2 years after I bought the car new in '89, even after the dealer replaced the ECM and IAc (for a different problem).