Well last night on my way home from orland i stop at a light and the car dies out. So i start it and the light turnes green so i go and it was like just moving and was sputtering then it cleared up. and now if i get on it above 3 grnad its like missing kinda. You know indy cars when they shift how it sounds like that that is what mine sounds like. could it be a bad o2? and then if you get on it it does it all the way like say at 3 grand 5 grand and right b-4 it shifts