Idle sits at 2,000 RPMs, cold or warm.

Runs great otherwise.

 

Any suggestions?

 

Thanks

IAC stuck, poss vacuume leak, if the idle is high, its getting extra air from somewhere...

inspected and cleaned IAC solenoid; can't find a vacuum leak.

 

Would a bad O2 sensor explain this?

Are you using a matching harness and intake?

 

Early(90,91) Manual trans legacies use a different IAC with only 2 pins. Is it possible you have a missmatched harness/ECU/intake?

 

Also have you double checked that the idle switch in the TPS is making contact when throttle is closed?

I had the same problem, then realized that my throttle cable was too tight...maybe you just need to loosen it up?

I will work through some of these suggestions and report back. Thanks.