So as long as i have have this car now this problem has always been here. Under any throttle below my p.e set point 30% throttle. My wide band will show my tip in a.f.r shoot to 12ish then almost immediately bounce up to 15 to sometimes 16 afr then back to 14ish. I am attempting to get rid of the lean spike car does this anytime i get off the throttle and back on it. Trying to research info on the acceleration and transient fuel for the l67 but i can't find much. I did find a old post and adjusted the ae/tps delta the decay rate and ref counts. On my last log and flash i really just started to make big swings to see if anything would change it but i didn't notice any difference. You will see huge kr spikes about every throttle stab. Be aware i do have a header clamp smacking the sway bar.