CVO 11/26/2012FUEL SYSTEM PRESSURE
1997 Pontiac Sunfire 2.2L SFI OHV 4cyl
The Fuel System Pressure
41-47 PSI (Pounds per Square Inch)Vent the fuel tank vapors by loosening the fuel cap remove the electric fuel pump fuse and start the engine . Allow the engine to run until it runs out of fuel and stalls.After spinning the engine over for a period of (3) to(5) seconds, turn off the ignition switch and install the electric fuel pump fuse. Next, install a fuel pressure gauge in the fuel rail supply line, and secure the fuel tank cap.With the ignition key in the on position, verify that no leaks are present and start the engine.Visually verify the PSI reading on the gauge
If the fuel system pressure isn't in the criteria, replace the fuel pump.