When checking fuel pressure, factory specs call for readings of 40.5-47.0 psi with ignition key on and engine off. Our reading was right in line at 43.0 psi. With key on and engine running, factory specs call for 3-10 psi lower than engine off readings. We found 36 psi, which was right in line at 7 psi below engine off readings. So we knew we had a good starting point.