boost dilema

[wyoa4b7]

so my car has the unitronic m-box tune and its supposed to be peaking 22 psi and stabilizing around 20 psi. I have changed my N75 valve and even put copper plugs in and when i did all of this it ran 15 psi through the first 4 gears then shit out on me and went to stock 7 psi and won't go above now... does anyone on here maybe have some insight on what might be happening? We are gonna pull logs tomorrow using vag-com and send them off to see what is happening but besides that I'm totally beside myself on what is happening!!!

[DieselElectric]

First, it's usually not advisable to do a 1-5th gear pull with a car that isn't functioning properly.

Sounds like limp mode. CEL? Anything abnormal worth mentioning?

There could be a thousand different things causing your issue. With the information you've given, guessing right would be the equivalent of a blind man crossing the freeway.

[f4m0u5]

Sounds like limp mode. Keep driving around till you pop a code(some times the cel does not pop up. Use vag com to scan car cause some ond2 readers wont read vag codes.

Also check block 32 to see ur trims.

[Corradovolksb]

Are you running stock k03 turbos? If so there is no way you will hold 20psi to redline so you may want to check with Unitronic to make sure that's what your tune is setup for. My vote is also limp mode but that will keep you at 5psi on stock k03s. Check for faults in the ECM and report back.