Fuel Pressure Test - Without Test Port

Fig. 7 Fuel Pressure Test Port - Typical:

NOTE: The fuel pressure test port is used on certain engines only. If equipped, the test port will be located on the fuel rail near the throttle position sensor. If not equipped, refer to the following procedure:

Fig. 8 Installing Adapter Tool And Pressure Gauge:

All fuel systems are equipped with a fuel tank module mounted, combination fuel filter/fuel pressure regulator. The fuel pressure regulator is not controlled by engine vacuum.

With engine at idle speed, system fuel pressure should be 339 kPa +/- 34 kPa (49.2 psi +/- 5 psi).

WARNING: The fuel system is under constant fuel pressure even with the engine off. Before disconnecting fuel line at fuel rail, this pressure must be released.

1. Release fuel pressure. Refer to the Fuel System Pressure Release Procedure.
2. Disconnect latch clip and fuel line at fuel rail.
3. Connect adapter tool number 6923 into the fuel rail. Be sure adapter tool is fully seated into fuel rail.
4. Install latch clip to fuel rail. If latch clip can not be fully seated into fuel rail, check for adapter tool not fully seated to fuel rail.
5. Connect vehicle fuel line into adapter tool 6923. Be sure fuel line is fully seated into adapter tool 6923.
6. Remove protective cap at test port "T" on adapter tool number 6923.
7. Connect the 0-414 kPa (0-60 psi) fuel pressure gauge (from gauge set 5069) to the test port "T".
8. Start engine and note pressure gauge reading. Fuel pressure should be 339 kPa +/- 34 kPa (49.2 psi +/- 5 psi) at idle.
9. If pressure is at 0 psi, connect DRB scan tool and refer to Powertrain Control Module/Testing and Inspection.
10. If operating pressure is above 54.2 psi, fuel pump is OK but fuel pressure regulator is defective. Fuel pressure regulator is not serviced separately. Replace fuel pump module assembly.
11. After performing pressure test, install fuel line into fuel rail. Install latch clip into fuel rail.