R56 N14 JCW
Currently fighting 2B5C-DME and losing...
I've looked through a lot of the threads on here but coming up short on a lot of the fixes people had
As of this moment I am pushing about 2-2.5 psi max, read via ultragauge, when attempted to push the car harder it will throw a CEL.

For diagnostics, I have done a smoke test and pressure test and unable to find anything concrete.
Replacements include:
MAF sensor replaced
Throttle body cleaning and replaced
Boost solenoid replaced
Cut off/diverter valve spring replacement to whole sensor replaced
Walnut blasted ~10k ago, just put a can of CRC turbo/intake cleaner through
Catch can installed, valve cover to manifold

Nothing above has worked and seeking wisdom

 

Hi, did you ever determine what was causing you the issue?

 

if I remember correctly.. it was the vacuum line to the turbo, reseated and worked

 

Thanks.

Even with smoke testing, it didn't show up initially?