so i just got my truck back3 days ago. I got a cam putt,my heads worked,and a "HD" job on my tranny. and it felt weird when i got it,and the guy told me the cam had to adjust and what not. so yesterday i went and got my cats cut off and got a tune. so now,i try driving it,and it seems like its going to turn off,and its not responsive at all! i cant even try it right. and its throwing white smoke,it smells like gas. what could be my prob?