Replaced fuel bubble which was hair lined cut and cracked on the under side. Replaced fuel filter and fuel line as well as the return line. I cannot get fuel to fill the bubble, but if i squeeze the the bubble I can see it pushing the fuel away as if it's ready ti draw up the line to the fuel bubble but it does not . I've checked it out throughly for clogs and gumming in those areas but with no success. There is apiece that mounts behind the fuel bubble area that has me suspicious.