Your post is very "rambling" like. First removing the AP would mean your running off the stock mapping which is bad with your mods. That was probably the worst thing you could do. Secondly the ECU uses 0O2 sensor feedback in closedloop (cruise/light throttle/idle). Basically the ECU has the ability to make adjustments to hit the target fuel ratio in closedloop. When you mash the pedal the ECU switches to openloop fueling,which does not use O2 sensor feedback so there is no correction happening. Go back and edit your post to make more sense and be more detailed.
Homebrewed tuned with Opensource!