Shawn, it sounds like the IAC is trying to compensate for some type of leak somewhere. It wouldn't be at 0 if it didn't think it needed to be. I wish I could help you out, seems weird after I fixed the epoxy and all, but I never touched the throttle blade or the adjustments. I didn't think that there was supposed to be any type of light coming around the blade though? I've never seen the ZZP HVTB in person until you sent yours to me, so I dont know if they machined that out any or not. You may want to double check that area though.