Combine ribs and water to cover in a large Dutch oven. Bring to a boil . Reduce heat; cover and simmer 45 minutes or until tender. Drain.
Combine sugar, salt, and pepper; rub over entire surface of ribs. Place ribs, bone side down, on grill over slow coals. Grill 20 minutes; turn meaty side down, and cook 10 to 15 minutes , basting frequently with barbecue sauce.