Okay here is my scenario... I had a V6 MFI Swapped it to a 4BBL V8
so I put a mechanical pump on the V8 and it would seem to vapor lock (since it was pulling through the electric pump.
When it would vapor lock the car would die. So I took off the mechanical pump and wired up the electric pump.
I have a fuel pressure regulator in place I am guessing three port.
the arrows look like this

__
( )
( <-- V --> )

The line from the tank is connected to the bottom
the on to the right to the carb
the one to the left blocked off....
the fuel tank return i blocked off... I tried connecting that to the left line on the FPR but the car never got fuel...
so the way i have it hooked up now ... it gets like 5 PSI and soaks up my fuel like crazy.... tune it down anymore it dies...
drains my whole tank within 100 miles...!!!!
someone help me?

 

what fpr do you have? I just did a mallory return style on mine. helped out alot.

 

Its some sort of holley.... I am not sure but I hope someone has some sort of insight on this...

 

First off i would rig up the return line, thats got to be hard on the pump having it blocked like that!

 

I will un block the return line and hook it to the regulator and see if that helps I dunno

 

I connected the return line and the car runs fine.... but I am still running way too rich... I have to fill up after 2 days... I drive maybe 40 miles a day

 

Reduce the fuel pressure at the carb to 3-4 PSIG. Make sure the float, inlet needle, and seat are operating properly. The rest is in carb tuning.

 

I have it tuned to about 2-3 psi and it runs super rich. if I tune it down more the car bogs at high RPMs I know I dont need that much fuel since you can smell the gas for sure and it eats a tank in a couple hours. I guess I will have to look up carb tuning.