I am running a Comp XS282S with a self tuned and built Megasquirt system (MS3X) and it idles and drives great!
PID Tuned closed loop idle as well. I have the ICV Valve set for 1000 RPM target, and it does a good job of keeping it there no matter the load.
I have an IAC motor and so far have had to keep it closed and off to have consistent idle with my MS3'd Gen III Hemi. I don't even know what the PID is and the Algorithm for IAC is either always moving or always on and neither makes sense to me. I have good clean idle once it warms up but have not figured out a good warm up mode/cold start setup and I know I will need the IAC for that.
