I had cold idle issues with the AIS that came on my R/T. I swapped out with a TII unit and it cured the cold idle problem, but it won't idle below 1200 rpm. I tried a 2nd TII unit, same thing; great cold driveability but high warm idle. Swapped back in the bad TIII piece, won't idle when cold but will go down to 800 rpm warm idle. Swapped in yet another known excellent AIS out of my TII Omni, great when cold but still a high idle when warm.
I also noticed that when I'm coasting in nuetral the bad TIII piece will hold the idle around 1300 rpm until I stop, while the TII units hold it near 2k until I stop.
Do ya have any ideas???