Fuel System Pressure Test: Notes
WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 1994 GMC Yukon, 1994 GMC Suburban, 1994 GMC Pickup, 1994 GMC Cab & Chassis, and 1994 GMC C3500 HD. However, it is still accessible from the selected car via links, so may be relevant.
WARNING:
Begin fuel system trouble shooting and diagnosis with fuel system pressure test. Relieve fuel system pressure before disconnecting any components or installing fuel pressure gauge.
NOTE:
Fuel pressure specification on 7.4L engines should be 26-32 psi (1.8-2.2 kg/cm2
), and on all others is 9-13 psi (.63-.91 kg/cm2
).