Fuel Pressure Inspection

Fuel Pressure Inspection

WARNING:

A small amount of fuel may be released when plug bolt is removed. Place container under the fuel feed hose or fuel feed pipe with a shop cloth so that released fuel is caught in container or absorbed in cloth. Place that cloth in an approved container.

1) Relieve fuel pressure in fuel feed line referring to Fuel Pressure Relief Procedure Fuel Pressure Relief Procedure.
2) Disconnect fuel feed hose (1) from fuel delivery pipe.





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

(A): 09912-58442

(B): 09912-58432

(C): 09912-58490





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

7) Measure fuel pressure at idling.

If measured pressure doesn't satisfy specification, refer to Fuel Pressure Check Fuel Pressure Check
and check each possibly defective part. Replace if found defective.

Fuel pressure specification
With fuel pump operating and engine stopped: 270 - 310 kPa 2.7 - 3.1 kg/cm², 38.4 - 44.0 psi
At specified idle speed: 220 - 260 kPa 2.2 - 2.6 kg/cm², 31.3 - 36.9 psi
With 1 min. after engine (fuel pump) stop (Pressure reduces as time passes): over 200 kPa 2.0 kg/cm², 28.4 psi

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

WARNING:
As fuel feed line is still under high fuel pressure, make sure to release fuel pressure according to the 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 delivery pipe Securely.
11) With engine "OFF" and ignition switch "ON", check for fuel leaks.