Fuel System Electrical Test: Notes
WARNING: This page is about a different car, the 2003 Isuzu Rodeo Sport, 2003 Isuzu Rodeo, 2003 Isuzu Axiom, and 2003 Isuzu Ascender. However, it is still accessible from the selected car via links, so may be relevant.
WARNING:
Relieve fuel pressure before connecting fuel pressure gauge. See FUEL SYSTEM PRESSURE RELEASE
under FUEL SYSTEM.