This is for a 1979 stock Nikki with stock fuel return line. The previous owner put a new fuel pump on that delivers 7psi and is causing flooding. I'm finding contrasting information on PSI. The FSM tells me 3.7-4.7psi, but some sources say this pressure was determined with the return line capped and to run it more in the 3psi range with stock return line. Can anyone validate this or shed some light onto this?

 

2.5psi

 

Great thanks for the information. Sounds like I'll be going with a Holley 1-4 psi regulator.