i am having a problem with fuel pressure on a 6.0 in an obs suburban (98).
after i did the swap i checked fuel pressure and was only getting 38 psi at the rails. i tried adjusting the regulator ar the rails (return type rails) and was able to bring it to 50 but the regulator was leaking so i had to replace the regulator. then the fuel pump went out and i replaced the whole unit with a GM delphi unit. this has raised the pressure to 42. i am at a loss of what to do next.
please help