Quote Originally Posted by aLmk View Post
Well the source for my wastegate is its own source straight from the comp housing. The only thing T'd into anything is the bov and it works fine. And it isn't that we can't figure it out. It did creep, then didn't, then did again. And I have no idea why it did either.

I really really really doubt the diaphragm has any damage. Have you ever changed a spring in a wastegate? You would have to try pretty hard to damage the diaphragm when doing that. As for the pressure source leaking that is amazingly unlikely as that's the same exact pressure source and fitting as it was before it went to the shop, in fact that wasn't even touched.
Thats why I think its vacuum related. Things happen. And yea highly unlikely but possible. More probable than a piece of a broken gear hitting a sensor in a tranny causing a malfunction IMO.
And yes I've changed a wastegate spring, many times. Thats how I first found out about my 38mm having a rip in the diaphragm.

And do you have a TiAL MVR 44mm gate or other liquid cooled gate? Gotta make sure the ports are closed, and that you don't have your vacuum line connected to one on accident. Its obvious, I know. But in the world of troubleshooting, thats where you start first. Dont take it the wrong way