Those of you with A9S ECMs and a T-5, question for ya..

Ok, over the weekend I converted my car to mass air with an A9S ECM and a C&L mass air meter. Before the conversion, between shifts, the idle would drop like normal. Now, the idle kind of "hangs up" between shifts and it's getting annoying. I've had issues with the IAC before where the idle would stay at 2000 RPMs when putting it in neutral while coming to a stop. That's stopped since the swap. It's now while actually driving the car that it's doing it.

You guys ever experience this? You think it's an IAC problem? ECM problem? MAF meter problem?



Thanks in advance for any help.