This may sound like a strange problem, but the past few times I have tried to put gas in my tank in my 99 Boxster, and I have problems. Even though I may run the tank close to empty, when I go to pump the fuel from the same gas station and pumps as always it will not allow the fual to enter very well. It will constantly kick the fuel off. I try barely squeezing the handle and feeding it in slowly, but it sounds like it just cannot take any more fuel, although it is nowhere near empty. Needless to say it takes forever to fill the tank. When I say slowly, I mean to the point where the fuel is barely flowing. Otherwise it wants to kick off or spit it out the hole at my hand. I tried moving the handle around in different positions, and tried different gas stations but the problem remains. I have had the car for 2 years and it just started this problem. It is as if there were something cloging the filler neck, but I have a locking gas cap and the factory cover lock as well.