pump went out on my 37 ford...had a little can type carter on it worked ok but did not last..got a hi performance rotor carter pump...installed it but it never shuts off.. is this how this kind of pumps works? if I pull line off carb I can fill a gas can..and it seems like it never fills the filter I have in front of the pump. parts store replaced the old one but from what I see on line , I don't have much faith in it. first one did not last long...thats what im running now. but keep thinking its going to quit!! takes the fun out of it !! anybody run a rotor pump ? is that the way it works? any help would be great!! [S