I'm cross posting this, just incase I resolve the issue, it'll be easier for other people to find. <p>"I searched, found one post sort of related to this, but it never seemed to be resolved.<p>On the way to work, I was making boost at normal levels. On the way home, I noticed the car wasn't feeling as peppy as usual, so I floored it off a light, and my gauge was only reading around 4 psi.<p>Scanned, didn't get any codes. Max boost only ever reached 4 psi.<p>I can hear the turbo spooling up, from what I remember, just as loudly as usual. The wastegate still actuates, I can hear that too. No stuttering, no stalling. Vehicle feels fine through-out the entire RPM range. The only issue seems to be lower than normal boost.<p>TCV going maybe? I don't really even know where to begin. Help! "