I own a 2010 AUDI A4 Quattro Premium with the 2.0 TFSI engine in it with a cold air intake, high flow cat down pipe, and a stage 2 APR tune on it. Whenever I start the car or get on the throttle hard there is a black cloud that comes out of the exhaust pipe and fuel is sprayed onto the concrete below (pictures coming soon) the engine is good on oil and I haven't overfilled the gas tank, so what would some common problems be? Is this the dreaded piston ring issue? My car has 130XXX mil s on it . Any input would be greatly appreciated!