PCM Diagnostics & Tuning - IAC Adjustments After Tuning... rich now?

I had my car tuned after I installed the cam, and Sean, who tuned the car, agreed with me that the car was running alittle bit rich at idle. So he adjusted everything, did the full tune, and then I went to a second speedshop to get a dyno done for before/after #'s w/ my cam. Well my buddy workin there hooked up the tech 2 and noticed that my IAC was pretty high, so he had one of the mechanics at the shop make the adjustment on the TB and he checked on the tech 2 and comfirmed that it was back down to a more reasonable range.

I really hadn't sat in traffic in between shops, so I can't give a definite comfirmation on this. But my car smells like its running pretty rich at idle. I'm comparing the smell to a friends car who is tuned and runnin the same exhaust setup and my car smells alot more like straight gasoline than his does.

My question is, by having it tuned, and THEN adjusting the IAC screw on my S2 TB, could that have messed up my a/f ratio at idle?

The gas smell is most likely because your A/F ratio at low speeds and idle is not as good as it can be. You'd probably benefit from a good speed density tune. Your VE tables are probably not in the ballpark for good A/F ratios when in open loop. Adjusting the TB to drop IAC counts shouldn't jack with your A/F ratio though. Your original tune may not be as good as your friend's tune.

By the way, you may get some better answers in the PCM section. Let me know if you want me to move the thread there.

yea ... I didn't think about posting it in the PCM section ... if you can go ahead and move it to there.

Thanks,