Mix first 4 ingredients in a bowl. Place pork chops in a glass baking dish. Pour marinade over them, turn chops to coat both sides. Cover with plastic wrap and refrigerate at least 2 hours.
Preheat outdoor gas grill to very hot. Remove chops from marinade and discard marinade. Place chops on grill and cook 8 minutes on first side with grill cover open. Turn chops and cook 5 more minutes with grill cover closed.