I wanted to check the fuel pressure on my 2001 4.6 this afternoon so I consulted my Haynes manual and got the manual gauge out of the toolbox. The manual says I should have 30-50 psi with the vacuum hose attached to the fuel pressure regulator and 45-55 psi with the vacuum line detached. I think I know where the regulator is on the passenger side of the engine but it has no vacuum line. Is this correct? I only showed 30 psi when I started the car and I guess that seems low. Now that I think about it I never hear the pump when I turn the key like in my 1994 302 powered F150. What's up with that? Should I hear the pump? Is only 30 psi enough to cause an accelaration problem like stuttering? The car wants to fall on it's face unless driven lightly. Any ideas are welcome at this point...