Why is this happening?!!Please help.

no baffles. i run a little electric pump and regulator, along with my stock pump, with two inline filters before the electric pump and between the stock pump and the carb, just to avoid any issues. my fuel system goes; tank-fuel line-filter-electric pump-regulator-fuel line-stock pump-filter-pressure gauge-carb. it runs at 5 psi consistantly all day long.i do this in the event my stock pump fails or get weak.