I am posting this for a friend/member on here in the Syracuse, NY area. He is not one for asking for lots of help so this is a crapshoot:
Username: shelbyglhs151
Full Name: nick spina
City, State, Zip: whitesboro ny 13492
Contact:call 315-745-0054 or email shelbyglhs151@hotmail.com
As you can surmise from the username, he owns an '87 GLHS and is having issues with boost. I do not know all the details, but I will highlight what I know.
-Stock T2 car-
It is not boosting past 5 psi and the turbo is a known good(freshly rebuilt) T2 Garrett. All of the 'diagnosing' that I have done with him has been via the phone, so there is a LOT to be desired when speculating possible issues since I can't see it in person.
I do know that if he wires/holds the wastegate closed so that it doesn't let boost escape(weak wastegate can), it will hit 12 psi, but I am not sure if that is what it should be on an '87 T2 car. I 'think' it is supposed to spike up to map cutout I believe, but I may be wrong.
At this point I am not certain if it is a leaking vacuum line, bad WG can, bad WG solenoid, or something along those lines. Really, I was just hoping that a local to his area like Bucar. Orangetona, 1fastcsx289, etc. He is not on here that much and at this point and he is stumped. Rather than throw money at it, I was hoping someone might be able to stop in if they were passing through and give it a once over, or even give him a call to help walk him through solutions.
Give him a shout on his cell(he's in sales) and maybe set up a time to help him out. Thanks...