Fuel Pressure: Testing and Inspection

FUEL PRESSURE TEST

CAUTION: Safety glasses must be worn when performing this service.

1. Reduce the internal pressure of the fuel pipes and hoses by the following procedures.




- Disconnect the fuel pump harness connector after removing the rear seat cushion.
- Start the engine and after it stalls, turn the ignition switch to the OFF position.
- Disconnect the battery negative (-) terminal
- Connect the fuel pump harness connector

2. The fuel filter is located in the left side of the rear quarter of the engine compartment.
3. Remove the single tie-wrap that secures the fuel pressure line to the fuel return line.




4. Remove the electrical connector from the master cylinder reservoir.

CAUTION: Before proceeding to next step, place shop rag over fuel filter to capture fuel spray.

5. Move shop rag enough to expose bolt on top of fuel filter, remove bolt and line from filter.




6. Using the fuel pressure gauge, gauge connector & gauge adapter (09353-24000, 29000), install the fuel-pressure gauge to the fuel filter. Tighten the bolt to the specified torque.

Fuel pressure gauge to filter torque: 25-35 Nm (18-26 ft.lbs.)

7. Connect the battery negative (-) terminal.
8. Start engine and check for leaks. If no leaks are present, continue with fuel pressure test. (at curb idle speed).




9. Connect (Disconnected) the vacuum hose from the pressure regulator, (and plug the hose end). Measure the fuel pressure

Standard value
Disconnected hose: 300 kPa (44.37 psi)
Connected hose: Approx. 255 kPa (37 psi)




10. If the results of the measurements made in steps 9) are not within the standard value, use the table to determine the probable cause, and make the necessary repairs.




11. Stop the engine and check for a change in the fuel pressure gauge reading, which should hold for approximately 5 minutes. If the gauge indication drops, observe the rate of drop. Determine and remove the causes according to the table.
12. Reduce the pressure in the fuel line.
13. Disconnect the hose and the gauge.

CAUTION: Cover the hose connection with a shop towel to prevent splashing of fuel caused by fuel residual pressure in the fuel line.

14. Replace the O-ring of the end of the hose.
15. Connect the fuel hose to the delivery pipe and tighten with the specified torque.
16. Check for fuel leakage.