It wasn't a proper diagnosis, though. He just turned the key and called it a day.
I'm scouring the forum for similar experiences and I found this thread:
www.subaru-svx.net/forum/showthread.php?t=59411
It's a bit baffling to me that their problem was confirmed/circumvented by drilling holes into the exhaust.
My car has been running very rich and there is black soot on the inside of the exhaust tips, as well as my fuel economy has been pretty bad, but I chalked that up to the fact it was sitting for so long (2 years).
Thoughts?