**** you have a good one. I'll poke around some more on this. Fuddyduddy, you have any thoughts on this?
I know your new exhaust will have a negative effect on the indicated boost to some extent, but it should've been minor, and you would have noticed it already. I'm wondering if you might have gotten some debris lodged in a vacuum line during the rebuild?
Maybe yank all the lines one by one and blow them out. I'd tell you to swap gauges with someone else, but that would be kinda a BITCH!