Hello - first, please bear with me.. I've searched & read up and have some ideas, but I'm hoping to leverage those with someone who has 'been there' (I'm car-savvy but very early into the turbo learning-curve)
Is a 1991, 145K and totally stock except 2g manifold. On test, I'm making max ±6psi from the turbo.. and it takes a while to get there, it's a slow & steady from 3000 to about 5500rpm 6psi.
I will diagnose over the weekend, & am looking for help understanding what is most/least likely culprit. Seems like these are some candidates I should look at. whaddya think?
- leak in system (pressure test at turbo, at TDC)
- turbo going south (inspect shaft play, blade damage, cavernous cracks)
- BOV or WG issues (i'm very foggy on these 2, need help)
- cat is clogged (is this really that likely a cause?)
- other?
Thanks in advance for your input!