fast efi problem

I have the same exact issue with the EZEFI 1.0. If I pump the throttle too many times(like with a carb) it will go into a funk,It will stall and have to held wide open to start, run crappy, there will be no faults, its the 02 sensor on tilt. The only way to cure it for me is with a new tune, once that is done it will work without any issues. I always carry the hand held with me, dont pump the throttle to kind of show off. I have leaned it richened it and nothing helps, It works fine for eveything else. So in a way I drive it like a corolla to avoid that situation and run it as normal for all else.