[Revnato]

I didn't have a rattling issue, but I did have a smoking issue.

I did exactly what you're trying not to do (replace a ton of shit to see if it works). It ended up being the turbos that were causing the smoke. When the indy shop removed the old turbos there was a bunch of dried up burnt oil so apparently the turbos were clogged up and had started leaking.

Replaced the turbos and the problem was solved. This was after replacing injectors, coils, a tone of hoses, all sorts of shit, almost replaced the valve seals (thank go I didn't). Needless to say it broke the bank, but god damn it its back and running better than ever.

Hope this helps.