Ok, well. I messed around adjusting the plate again. I took a look at my stock TB and the plate is completely sealed around so I figured the aftermarket should be the same. So I backed the set screw all the way off until it wasn't touching and ran it in a 1/4 turn, much like I had it when I reinstalled it. I poped in my original IAC valve and reset the PCM a few times. At idle in park its reading 27 although it was at 40 for a time. How long does it take for the IAC to properly adjust?