Couple days ago I was driving and while waiting to turn my car died. I started it back up drove a little while then it died again and threw a code, code is unknown at the moment being as how I don't have $75 to get diagnostic's done.

I believe the culprit is my opti, I have had the misfire problem since I've had the car and just assuming that my opti is on its last legs. However, after the SES light comes on it doesn't stall anymore, however throttle response sucks and it still misses. Can anyone give me any idea as to whats wrong if its not the opti? I'll try as soon as I can to get the codes pulled. Thanks