M3 smoke at 5500 rpm's

[rios26]

Hello, My M3 is throwing black smoke every time i get to 5,500 rpms. Does anybody has any idea why this might be happening?

[superboosted]

Black smoke is fuel..so going rich at that point for some reason. Maybe somebody more familiar with that motor will chime in on what could cause it.

[ex566]

oil leaking onto manifold, find the leak !