The turbo has been working fine for a while, until recently. The car does not seem to want to idle worth of **** - and throws misfire codes every once in a while when I start it (from 500-1000 RPM).

Since nothing has really changed, wondering if the O2 sensor could be causing the problem? I don't think its the IACV, because the car only has 34K miles on it (2001 civic).

My setup includes the greddy emanage, and RSX injectors (stock size is 240, these flow around 360) - so my MAP signal is being manipulated - like the hack.

Basically - when I start it, everything seems fine, until it warms up. Once it warms up, the idle can be unpredictable. Sometimes it seems to drop to 700 RPM and hold, other times it overshoots the mark, dips below 500, and slowly comes back up to 700.

There is also a hot / warm restart problem as well - I have to give it gas to start it after its been running a bit.

I've read a lot of folks play around with the IACV to fix their problems. I don't believe there is anything wrong with mine due to the fact that things were working fine before installing the turbo (plus its relatively new). Since the car was running fairly rich during tuning, I am wondering if changing the primary O2 sensor could be a possiblity....Well, that and the fact that it seems to be mostly an issue after the car warms up (makes me wonder if its an open loop / closed loop issue).

Other things I'm going to check - vacuum leaks in the hoses, possibly a bad MAP sensor (didn't have a missing link or check valves installed - only the boost cut feature of the emanage turned on.....possible that I damaged the MAP sensor on boost).

Anyone have any recommendations, as this is really frustrating!