Just look at the wiki, it says "KFKHFM, KFLF - fix up individual rich/lean areas, and WOT fueling issues". Solved!
Topic starter, if you run a k04-020 with 386cc injectors and 80mm o.d. maf: flash your original AMU file bring your car to a garage.
If you have a K03 turbo, 315cc injectors and 70mm o.d. maf: flash the AJQ file I posted and log the car.
If you have a mix of parts, or you are not sure: bring your car to a different tuner that has some reputation and a dyno.
Thanks for the entertainment