Fuel pressure dropping while driving and under acceleration to zero at idle runs 4 lb electric Blue

I barely use the stuff anymore, but at one point I installed clear fuel line and discovered fuel boiling at every metal point in the fuel system underhood. Switched to a mechanical fan and no more boiling.
3/8 return line, is it a return style regulator? I put a .030" restriction in my return with a cheap non-return regulator(po boy style).