Hi all im new to the forum but not to Audi. I recently purchased my fouth audi second turbo one. Its a 2000 Avant 5 speed quattro 1.8t i picked it up about 3 months ago in this time i have put a clutch new turbo new 710n and some misc things it needed. My problem now is i put the eurodyne stage 1 software in it. It boosts kinda weird when it hits 15psi or so it acts like the wastegate opens and shuts and continues to about 20psi or so. Its really fast when it does it. Im thinking my n75 but not sure the car has 167k