Ok this could be something simple. The car simply screams and does not miss a beat. Timming is set at 14 degrees, no pings. The smog pump has been removed by the previous owner so the cats that are on the car just blow out the back. I have black crap puffing out of my exhaust when I rev the motor. Its not gas, at least I don't think, it does not smell like gas. How can you lean out the motor if it is FI? Could the Cats be making this black crap come out the back? Im still learning with the FI, if it were a carb I could just set the mixture. Help me out guys.....