Ok guys sorry too start another I need help thread,but I need help!! I have a Bf Xr6t Manual Stock standard other than a k&n pod replacing the air box I Fueled up the other night (98 it was a hi-flow pump also) As soon as I left the servo the Engine light was on, Car ran fine half way through the tank I was cruising in 5th and the car bucked so I pulled over and it was revving from 200-1000 for 10-15secs Then that night it done it but not as bad then stalled,And on cold start up all you can smell is unburnt fuel ? So I bough a elm327 scan tool and im getting rich and lean codes (I think ill get the exact codes when I get home)And a o2 sensor heater circut? :s and I have done abit of research intoo it and there is 10-15 things it could be. Has anyone else had this or a similar problem?Where did you begin too look?Any help once again would be greatly appreciated! Cheers Dan