R32 Question Black Oily Smoke Coming Out Exhaust? Help

[TwinTurboSupra+R32 Gtst]

hey guys i have a weird problem it happens every now and then im not sure if its vavle steam seals rings? or who knows what hoping someone might have an anser still got it booked in for a compreesion test

its only just started to happen as i start my car for the day from cold no smoke giving it revs on the spot no smoke but when i take off after im in first or second gear there is a a heap of smoke then it goes away as im driving soon as i pull up to lights coming down the gears to a complete stop then a bit of smoke comes out but then i can rev it and no smoke comes out my car hunts a bit on idle i just changed my afm to see if it fixed it with a second hand one took my fuel pressure reg off and changed my oil to moblie 1 full syntheic it happens even when the car is warm but it comes and goes sometimes it wont do it at all any help on this topic would be great thanks.

[TwinTurboSupra+R32 Gtst]

its black oily smoke not white to!

[TwinTurboSupra+R32 Gtst]

anyone have an idea?