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

Rat Bastid said
Thats a smoking deal. Just remember if you can’t get the fuel pressure down with that pump it means your return line is too small for the fuel you are burning.

IOW’s, you are bypassing more fuel than the return line can support. You don’t want the return line being the restriction. Just the regulator.

If you can get the pressure where you want it then your return line size is fine and you are pooping in the tall cotton.

Keep us posted please.

So if I do need a bigger return if I can't get the fuel pressure down can I just come off the side of the pump back to my tank with a bigger return and block the return up front at the regulator or is it better to use the regulator up by the carburetors and run a bigger line all the way back