[MMGT1]

Yea, like graham said, sounds like the o ring has given up on you. Before you pull it off though, check the diaphram in it. Get yourself a piece clear tubing, take the vac line off and attach the hose to it. Suck on the hose and look for fuel in the hose. If you see fuel then the diaphram has a tear or hole in it and should be replaced. If it holds vacuum and no fuel present, just replace that o ring and you should be up and running! A fuel leak there will skew your idle trims horribly and make it run like ass. Fuel mileage will be affected quite a bit with a bad regulator as well man