Hello, my name is Eric. I work at a large restaurant in Northern Colorado and smoke brisket, Prime Rib, New York strips, pork ribs, pork butts, wings and other meats. I have been using a Treager pellet grill and the meats have been perfect. I just got a pre-owned Green Mountain Grill and am having problems with black smoke, thick black soot with a fuel type smell/taste. Any help would be great. Thank you.