Fuel Pressure

NOTE: For fuel pump specifications, see FUEL PUMP PERFORMANCE .

Release fuel pressure. See FUEL PRESSURE RELEASE . Disconnect negative battery cable. Remove air cleaner assembly. Remove fuel inlet hose from throttle body. Install Fuel Pressure Gauge (J-34730-1) and Adapter (J-34730-75). See Fig 1 . Reconnect negative battery cable. Check fuel pressure. See Figure and Figure , or 20 and 22. Release fuel pressure. Remove fuel pressure gauge.

Fig 1: Installing Fuel Pressure Gauge

Courtesy of GENERAL MOTORS CORP.

FUEL PUMP PERFORMANCE

Application	Pressure: psi (kg/cm² )
Engine Idling	13-20 (89.6-137.9)
Ignition O-n & Engine Off	23-31 (158.6-213.7)