Hi all ive got another 1980 1086 im having an issue with. It will start with prefilled filters and run for probably 10 seconds then sputter out like starving for fuel. I took the feel line to the filter off and blew it out and had steady fuel and took off all the return lines and made sure they were open as well as the orfice on the back of the pump. Now I get good fuel to the first filter in the systen but nothing out of the fuel supply pump to the final filter to feed the pump do these pumps go bad? And is this something i can replace or is this best to leave to a pump shop. Thanks