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Fuel Pump Pressure Test

NOTE: Begin basic fuel system diagnosis with testing fuel pressure.

Release fuel system pressure. See FUEL SYSTEM PRESSURE RELEASE  . Attach Fuel Pressure Gauge Set (J-34730-1 ) and Adapter (J-35957-1 ) to Schrader fitting on fuel rail. Disconnect pressure regulator vacuum hose. Turn ignition on. Allow fuel pump to run for about 2 seconds. Read fuel pressure. See FUEL PUMP PERFORMANCE  table2 ).

FUEL PUMP PERFORMANCE

Application Pressure psi (kg/cm2 )
Trooper 42-55 (2.9-3.9)