LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Geo >> 1994 >> Prizm Base, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Basic Testing >> Fuel System >> Fuel Pressure
July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Fuel Pressure

NOTE: For fuel pump specifications, see FUEL PUMP PERFORMANCE  .
  1. Release fuel pressure. See FUEL PRESSURE RELEASE  . Disconnect negative battery cable. Remove bolt and fuel inlet hose from fuel rail.
  2. Install Adapter (J-39802) with gaskets and fuel inlet hose to fuel rail. See Fig 1 . Tighten adapter retaining bolt to 22 ft. lbs. (29 N.m). Install Fuel Pressure Gauge (J-34730-1A) to adapter.
  3. Reconnect negative battery cable. Turn ignition on. Connect jumper wire between Data Link Connector (DLC) terminals B+ (Black/Red wire) and FP (Blue/Black wire). DLC is located on left strut tower. Check fuel pressure. See Figure or Figure . Release fuel pressure. Remove fuel pressure gauge. Remove jumper wire from DLC.
Fig 1: Installing Fuel Pressure Gauge
G93E78471Courtesy of GENERAL MOTORS CORP.
FUEL PUMP PERFORMANCE

Application Pressure: psi (kg/cm2 )
Prizm & Prizm LSi (1)(2) 38-44 (262.0-303.4)
(1) With ignition on, engine off, and jumper wire connected between DLC terminals B+ and FP. DLC is located on left strut tower.
(2) With engine idling, jumper wire removed from DLC and pressure regulator vacuum hose disconnected and plugged. Reconnect vacuum hose. Pressure should decrease to 31-37 psi (213.7-255.1 kPa).
scientia non olet · About LEMON Manuals