As I said a few posts ago mine does the exact same thing. my check engine light was on, rough idle, sputtering and so on. I remover my hypertech tune and my check engine light turned off, Idle is almost normal when cold, but once it warms up it's fine. Only thing that's still happening is it bogs down and it feels like it's gettin too much fuel/not enough air at WOT from a stop. Do you have any type of tuning device installed?