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· Not a mod... or is he? Or, is he not?
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For some reason the logs won’t open for me.

There could be a few things at play. Generally when the engine is at low rpm and high load knocking is going to be more prevalent. This is typically normal especially right after a shift where the rpm is at the lowest. Coupled with the rough idle thing you may well have an issue somewhere.

You’ve checked vacuum and boost. Have you checked your compression and have you completed a leak down test? That may be enough to cause a misfire and wonky idle but it may be good enough you don’t notice under higher load.

If the tgvs are deleted that may be your idle problem. If not I would almost suspect a leak on one of them.

Then there is the false knock issue. That’s not unheard of for an ej. It will give you the results you are seeing and generally shouldn’t hurt anything.
 
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