Well thats the question.

Reason im asking, is because over the last few days my usual spike 11 hold 9-10 has turned into a solid 8, and now has gone back to 5psi (which is the default boost that the DV opens at as a fail safe)

The reason I believe its a screwed DV is because as I get into boost higher than 5 psi, I get an almost owl type of whoing sound that changes as the turbo spools more. Under 5 pounds and everything is peachy

 

Stock DV? Never replaced that you're aware of? Possible it's going bad...the diaphram inside is probably worn out...

 

I know it wasn't replaced ever, so ill try replacing the vac line first, then switching to my bov, because I know it stays shut

 

Buzz member Emilgevor for a new upgraded DV. We put a pair of the ones he sells into his S4 last night along with a Giac ECU tuned for 16-17psi. They clamp closed strongly, hold boost very well, and from looking at one disassembled, appear very well-built. From what I saw and felt during the drive, they are awesome.

 

Thanks Devil. Yeah I have one left and the guy who emailed me about it is not responding. Let me know if you are interested and I will get you the details.