Okay, I've read everything in here and narrowed my problem down the the IACV on my 98 LX V6 that is idling up and down. Problem is that it is attached with two torx bolts, I've tried both a T10 15 and 20 and none fit. Anyone know what size they are???

Nevermind, I figured this out, it was mounted to the bottom of the throttle body, those just held the cover on.

Cleaned it and it runs perfect.