FUEL SYSTEM TESTS, INSPECTIONS, AND ADJUSTMENTS - CONTINUED
FUEL SYSTEM PRESSURE TEST - CONTINUED
Checking Fuel Transfer Pump Output Pressure
Remove return fuel line (2).
Install differential pressure gage in return fuel line
Adjust engine speed to 600 rpm with no load.
Fuel pressure should be 100 to 105 psi (690 to 724
If fuel pressure is within specified range, proceed to
Inspecting Fuel Pressure Regulator Valve in this work
N OT E
If the pressure is less than 95 psi (655 kPa), the fuel transfer pump is weak. The pressure regulating valve in
the pump may be stuck or worn.
Pressure regulating valve is located under access plug
Remove access plug (3).
Remove pressure regulating valve, spring, and
Inspect pressure regulating valve.