Fuel Pressure: Testing and Inspection

WARNING: Be sure to perform work in a well-ventilated area and away from any open flames, or there is a risk of a fire breaking out.

1. Relieve fuel pressure in fuel feed line referring to "Fuel Pressure Relief Procedure".




2. Disconnect fuel feed hose from fuel delivery pipe.

CAUTION: A small amount of fuel may be released when fuel hose is disconnected. Place container under the joint with a shop cloth so that released fuel is caught in container or absorbed in cloth. Place that cloth in an approved container.

3. Connect special tools and hose between fuel delivery pipe and fuel feed hose as shown in figure, and clamp hoses securely to ensure no leaks occur during checking.

Special Tool
(A): 09912-58441
(B): 09912-58431
(C): 09912-58490

4. Check that battery voltage is above 11 V.
5. Turn ignition switch ON to operate fuel pump and after 2 seconds turn it OFF. Repeat this 3 or 4 times and then check fuel pressure.
6. Start engine and warm it up to normal operating temperature.




7. Measure fuel pressure at idling.
If measured pressure doesn't satisfy specification, refer to "Diagnostic Flow Table B-3" and check each possibly defective part. Replace if found defective.




8. After checking fuel pressure, remove fuel pressure gauge.

CAUTION: As fuel feed line is still under high fuel pressure, make sure to release fuel pressure according to following procedures.
- Place fuel container under joint.
- Cover joint with rag and loosen joint nut slowly to release fuel pressure gradually.

9. Remove special tools from fuel delivery pipe.
10. Connect fuel feed hose to fuel delivery pipe and clamp it securely.
11. With engine "OFF" and ignition switch "ON", check for fuel leaks.