Replaced my stock fuel pump with a 255lph (high pressure) Walbro a couple weekends back and bought a fuel pressure guage (not the in dash type).
I measured my fuel pressure after the swap and it was rocking at 32psi at idle (18 hg vacuum). I thought it might be the fuel pressure regulator and swapped one out today from a Merkur(one of my three FPR's).
I played with the car a bit and found that if I take off the vacuum line to the FPR the pressure goes up to 40 psi. It stays there if I keep the manifold port plugged but the vaccum on the car goes to 14hg.
Does anybody have ideas here
I measured my fuel pressure after the swap and it was rocking at 32psi at idle (18 hg vacuum). I thought it might be the fuel pressure regulator and swapped one out today from a Merkur(one of my three FPR's).
I played with the car a bit and found that if I take off the vacuum line to the FPR the pressure goes up to 40 psi. It stays there if I keep the manifold port plugged but the vaccum on the car goes to 14hg.
Does anybody have ideas here