Fuel System Pressure Test
WARNING: This page is about a different car, the 1997 GMC Vandura, 1997 GMC Forward Control, 1997 Chevrolet Forward Control, and 1997 Chevrolet Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
For fuel pump circuit testing, see appropriate FUEL SYSTEM test in NO-START DIAGNOSIS .
- Turn engine off. Disconnect fuel line at inlet to fuel filter assembly. Install low pressure fuel gauge to fuel line.
- Crank or run engine 10-15 seconds. If fuel pressure is not 4 psi (.28 kg/cm2 ), check fuel lines and fuel tank sending unit for restriction. If fuel lines and sending unit are okay, replace fuel pump.