ROO4NFG

Came out this morning to move the car lent in to start up and allow it to warm up as usual but no go, just turned over like no compression got in the car put my foot flat to the floor and after alot of splutering it fired up with a cloud of black smoke behind, so took it for a run eng. mangment lite on and no boost, came back disconected the battery for a hour reconnected test drove no eng mangment lite, but does not seem to have that much power.
I have always run the car on super unleaded, it is a wrx sti ppp i have my dealer phoneing tommorow to make a booking, just wondered if any one has suffered with this.

thanks