well, i think i may have fixed it. I was bored and frustrated so...Just for the hell of it...i had an old ICP sensor laying around and figured i'd give it a shot. I have my bottom end power and black smoke back. And i'm not getting anymore codes!!! The good thing about all of this is i learned a few new things about the PSD and i have some new parts on it and i didn't spend a whole lot of money. Thanks for everybody's input.