I can't seem to figure this out. I'll be driving around and everything works fine, gauge responds instantly but, after a while the gauge beings to read very slow, sometimes just sitting at 20 vacuum, until i go wot then it reads boost. I went over all my vacuum lines, no leaks, someone mentioned it could be lack of back pressure from my exhaust? Anyway, id like to see what some of you guys can come up with, here is the clip. Sorry guys, its a little shaky.
-Erik