that plastic tee was way whack, i have a vac block like they were describing, check it
thoes 5 pipes from the tb all go to emissions shit, if you gut the manifold you can remove that entire thing of pipes. notice in my pic there is no fistfull of shit comming from the intake manifold
to check for vaccum leak go to home depot and get a 2 inch rubber cap. get an air compressor or drive to sombodys house with one first. cram it over your turbo inlet. poke a small hole in the rubber cap with a straight pin, and cram the inlet to the air compressor into it. then you are putting compressed air into your intake system, so it will hiss and blow air wherever it is leaking.