So say you have no issues in your fuel system but still read low fuel pressure 53-55psi driving around. What can you do to make it read 65psi? I understand there can be restrictions or defects but I cant find anything wrong with my fuel line for the life of me. I was thinking of adding a fuel regulator to return line but have no idea on what type and where to splice it in.....
I know spec is like 60 psi, but my 4.3 truck always read around that 54-55 psi and it seemed like it was just fine.
When I changed the engine (did a 5.3 swap) I was troubleshooting something else and plugged the return line and pressure shot to like 75 psi, so I knew pump was capable of producing much more pressure than what regulator was reducing to.
My other truck with the 5.7 engine also reads about the same 54-55 psi. At some point I changed to the MPFI, but it started just fine under that pressure with the old poppet injectors. I had to replace them because one was stuck closed.
My point is that fuel pump is very likely capable of producing much more "head" of pressure than what your guage reads...so don't automatically condemn the pump...you know what I mean?
Are you running the MPFI set up?