What mod to digest more fuel? ***Cam/Headers/Bigger throttle Body How calibrate the AFM for aged parts? ***email me for a copy of procedure Do most folks disconnect O2 sensor? **Beats me, but it will eliminate flat spots in acceleration on most cars very curious. I have a rising-rate adjustable reg. and it helped with a couple flat spots on torque curve, esp. 3000-3500 and 4000-4500 rpm. Why? ***With the O2 sensor at least, the mixture is too lean on acceleration, and that causes the flat spots. Just trying to learn.