Fuel Pressure: Testing and Inspection

WARNING: Before servicing or replacing any components in the fuel system, reduce the possibility of injury or fire, refer to Service Precautions.

^ Key Off.

^ Before releasing fuel system pressure at the schrader fitting, observe the Service Precautions to avoid fuel spillage and injury.

^ Install the fuel pressure tester.

STO Connector:

^ Ground the fuel pump lead of the Diagnostic Connector with a jumper.

^ Key On, Engine Off to operate the fuel pump.

^ Verify that the observed fuel pressure is within specified limits for the engine being checked.

Specifications:

Key On Engine Off 240-310 kPa (35-45 PSI)

Key On Engine Running (Idle Speed) 193-310 kPa (28-45 PSI)

NOTE: Maximum fuel pressure is obtainable with the vacuum hose removed from the fuel pressure regulator or at Wide Open Throttle (WOT).