i have a 93 atx and after driving for about ten minutes the cel comes on and when i stop the car while it is in drive the car shakes a little but when the rpms raise the problem seems to go away. I cant seem to pull any codes using the paper clip method the cel just flashes once right when i turn the key then it stays off. I think it might be a bad plug or wire since there is a lot of oil in the plug wells. has anyone ever have this problem with the car shaking/running rough? Also why cant i pull any codes?