Fuel Pressure: Testing and Inspection

FUEL LINE PRESSURE INSPECTION [L3]

WARNING:
- Fuel line spills and leakage from the pressurized fuel system are dangerous. Fuel can ignite and cause serious injury or death and damage. To prevent this, complete the following inspection with the engine stopped.

1. Follow "BEFORE SERVICE PRECAUTION" before performing any work operations to prevent fuel from spilling from the fuel system. Before Service Precaution

2. Remove the battery cover. Removal and Replacement

3. Disconnect the negative battery cable.

4. Disconnect the quick release connector (in the engine compartment). Service and Repair

5. Turn the lever of the SST parallel to the hose as shown in the figure.






6. Insert the SST quick release connector into the fuel pipe until a click is heard.

7. Verify that the quick release connector is firmly connected by pulling it by hand.

8. Connect the negative battery cable.

9. Ground the following PCM terminal 1BG using a jumper wire.






10. Turn the ignition switch to the ON position to start the fuel pump.

11. Operate the fuel pump for 10 s.

12. Measure the fuel line pressure.

- If not within the specification, inspect the following:

If it less than the specification:
- Fuel pump unit
- Fuel line leakage

If it exceeds the specification:
- Pressure regulator

Fuel line pressure (Reference)
- 350-410 kPa {3.57-4.18 kgf/cm2, 50.8-59.4 psi}

13. Turn the ignition switch to the LOCK position to stop the fuel pump.

14. Measure the fuel hold pressure after 5 min.

- If not within the specification, inspect the following:

- Fuel line for clogging or leakage

Fuel hold pressure (Reference)
- 250 kPa {2.55 kgf/cm2, 36.3 psi} or more

15. Disconnect the SST.

16. Connect the quick release connector. Service and Repair

17. Inspect all related parts by performing "AFTER SERVICE PRECAUTION". After Service Precaution