I about to install my 255lph pump and afpr. i was wondering with my mods in my signature what my fuel pressure should be set at. i know stock is 41psi. some people say 43psi and others told me all the way to 48psi at idle. which is best?
Re-connect it when you are finished setting the fuel pressure.
You will notice when you hook the vacuum line back up the pressure will drop a few pounds at idle. This is normal as your fuel pressure regulator adjusts for vacuum changes.