Everything is up to operating temp. (170 after a 10 minute drive on a cold day) In drive IAC counts are reading 175, in park they read 0. Idle in drive is around 800 (what the chip is programmed for) and in park it hovers around 1050. Correct me if I'm wrong but the IAC numbers increase when its adding air to keep the engine running. So the lower numbers mean its working less (in my case not at all) to keep the engine running. My question is what could be causing that massive fluctuation in IAC counts? TPS is at .44 at idle btw. I'm thinking just a simple re-adjustment might fix it but I started second guessing my self with that high of a difference.