Just read your response, could possibly fuel pump? It sounds like something small to be honest so maybe take it to a known mechanic/a jdm shop/tuner and have them look at it before you spend any more money. If they quote you a ridiculous price, at least you'll know what your issue is. Just last week my auto 33 turbo was having the same issues without the smoking. I got brand new NGK spark plugs as mentioned above, i taped up all the coilpacks with electrical tape (3 were red Ebay ones and 3 were stock ones, all looked fine to the eye but probably had hairline cracks). The boost was 10, i completely removed the boost tee and ran straight to the actuator to elimate issues with it (some are fakes and some just work shit, just run stock boost until you sort the issue).