I don't know exactly where the gas ports are but I assume they are in the barrel toward the end of the forearm. What I would do is clean the barrel very good ,and also clean the action. It's been a long time since I've taken mine down for a thorough cleaning so I cantbe as much help as I'de like to. But if you don't figure it out soon e-mail me and I'll see what I can do to help you. My address is posted on this site!