Name that sound: Subaru EG33 edition!
https://www.youtube.com/embed/KLlmcO8yEIM
Hear the ticking noise? That's coming out of the left-hand exhaust pipe. We get three even pops on the right side, and pop-pop-POOF on the left. My bet is that one of the exhaust valves on the left side is fried.
What sayeth the collective wisdom of the GRM?
Oh, and now that all the vacuum leaks are plugged/actually connected, it otherwise runs fine/idles/makes power.
Do a leakdown test on the suspected bank? Check valve lash?
I think a burned valve will also show up on a vacuum gauge, but don't quote me on that.
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