I've battled this problem for a while. And a few others lol. So fixed some and few others got to fix now. Check engine came up and took it to a local mechanic. One of them has 3 hours or work so he says lol. The other said he charges $80 to diagnose it. Crap. That's almost what my Aveo is worth lol. I was wondering if anyone has a computer to diagnose the check engine? I can drive to u. I would really appreciate it. I'm guessing it has something to do with that acceleration jerking thing going on