Runs good now in lower rpms but when i get on it it misses. It starts around 4500 rpms and stops till a little over 5k then starts to miss again i dont understand it. I have replaced 02's,wire,coil,opti, and plugs. The only thing i can think of is my mechanic said maybe one of my plugs is cracked or split or something. He said he put the scope on them and didnt seem any though. So any ideas man i'm sick of putting money in this car just to get it to run right

 

nobody knows?? could it do something with my fuel pressure?? maybe running to lean or something just wondering if this is a possiblity if so how do i fix it my neighbor has some gm programs and said that maybe their might be a fuel upgrade for it but i have no clue in programming my car any ideas?

 

I had the same problem but is was my Opti after a process of elimation. You check out you ground strap for your coil and change all the plugs to be on the safe side of things.


Good luck to you.