thats problew random misfire at idle. BP gas got that to go away for me. i used to buy gas because it was cheap but i have found out that they are not all the same. do your car a favor and put some good gas in it if your not all ready. and DO NOT run 89 octane. mine bucked like a mofo then, in nutral. and if you go with a pcm. overkill. i have heard nothing but good from them. zzp on the otherhand. eghhhh