W 350 Pickup V8-5.9L VIN Z (1990)
Fuel Pressure: Testing and Inspection
To test for fuel leaks, using the DRB II (or equivalent) scan tool, perform the following procedure:
1.
Turn the ignition switch to the ON position.
2.
Access the ASD Fuel System Test. This will activate the fuel pump and pressurize the fuel system.
NOTE: The ASD Fuel System Test will continue for 7 minutes or until the test is stopped with the scan tool, or until the ignition switch is rotated to the
OFF position.