Hey all, I'm having a strage issue with my A/C and the IAC in P/N. When I first start up the truck and turn the a/c on, I can hear the IAC ramp up and the compressor and e-fans kick on just fine. The engine does not drop RPM at all. Any time after the first time in P/N, the IAC never changes position when the a/c switches on, so the truck tries to stall, then the a/c turns itself off. It will repeat this over and over. As soon as I put it in gear, however, everything works correctly. The IAC ramps in correctly, I get no RPM drop when the compressor and fans kick on.

My IAC positions are as follows:

P/N A/C off ~110 steps
In gear A/C off ~185 steps
P/N A/C on ~160 steps
In gear A/C on ~ 270 steps

My Ramp In table is 15 all the way down, and my ramp out table is .179039 from 0-32 ft-lbs and .188805 from 36-52 ft-lbs. Any ideas why the IAC moves correctly on the first P/N compressor engagement but not after that?