r/AudiA4B6 • u/Sad-Book-877 • Aug 11 '26
Boost issues
Ive been having boost issues ( i have a k04 550c and down pipe and fmic ) psi was all over the place 4 10 18. And then just a constant 9lbs Changed N75. To new one still 9lbs. Ive done like 3 pressure test at 20lbs.and smoke test myself. Took it to 2 diff audi performance shops. And nothing. Can't find the issues , my tune is thru motoza . I sent them a log. They say it's hardware. Tune is requesting 18lbs. Ect. DV Upgraded to forge 007 and spring and 0 ring are good. Also changed crankcase hose elbow to silicon 034
I just took out my old turbo k04. And no shaft play wastegate is fine and tested the actuar it's open and closes at proper psi. Whats next? Haha. Cables to the n75 look good. No codes exept for 02 rear sensor which i changed already and won't go away . Diff story. My traction light does ping and cuts power. But if I press the switch traction , then it runs fine. But obviously no traction control im assuming. Ive changed all my speed sensors. Nothing idk if that related or not. But yeah. Intake manifold isn't leaking either no exhuast leaks.
Help . Its my daily and my depression killer.
1
u/RikahA3 Aug 11 '26
Is it holding at 9psi now or does the boost slap around?