GOOD MORNING JOHN, THE GM TEC DOES WORK VERY WELL AND CAN BE USED SEVERAL WAYS. YOU CAN JUST PUT A VACUUM LINE IN THE CAN AND CREATE A SIPHON AND LET IT FEED IN THROUGH THE PCV LINE OR THE THROTTLE [...] IN REAL BAD CARBON CASES YOU CAN DUMP THE CAN IN REAL SL... Login to read more.