Spectra GSX L4-1.8L (2000)
Fuel Pressure: Testing and Inspection
Fuel Line Pressure Inspection
1. Disconnect negative battery cable.
2. Release fuel system pressure.
See: Fuel Filter/Fuel Pressure Release
3. Install SST(OK2A1 131 001) to service port located on the center of the fuel rail.
4. Connect negative battery cable.
5. Connect data link connector terminals FUEL PUMP and B+ with jumper wire.
6. Turn ignition switch ON.
7. Inspect the fuel line pressure.
Fuel line pressure: 46-51 psi (320-350 kPa, 3.2-3.5 kg/cm2)
Pressure too high:
Check for restricted fuel return line
If line is clean, replace pressure regulator
Pressure too low:
Block return line and check if pressure rises
If pressure does rise, replace pressure regulator.
If pressure does not rise, measure fuel pump maximum pressure.
See: Fuel Delivery and Air Induction/Fuel Pump/Testing and Inspection/Pressure Testing Procedures
8. Turn ignition switch OFF and remove jumper wire.
