Fuel Pressure: Testing and Inspection

- Relieve fuel pressure in fuel feed line. Refer to Fuel Pressure Release Procedure.
- Using backup wrench, loosen plug bolt on fuel delivery pipe and remove it.
- Connect special tools (fuel pressure gauge) to delivery pipe.

Fuel Pressure Gauge:

Special Tool
(A): 09912-58441 (B): 09912-58431 (C): 09919-46010

CAUTION: A small amount of fuel may be released when plug bolt is loosened. Place container under the bolt or cover bolt hole with a shop cloth so that released fuel is caught in container or absorbed in cloth. Place that cloth in an approved container.

- Check that battery voltage is above 11V.

- 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.
- Start engine.
- Measure fuel pressure at idling.

Fuel Pressure Specification
Pump ON 2.5 - 3.0 kg/cm3
and 250 - 300 kPa
engine OFF 35.6 - 42.7 psi

At 2.1 - 2.5 kg/cm 3
idle 210 - 260 kPa
29.8 - 37.0 psi

Residual over 1.8 kg/cm3
pressure over 180 kPa
(1 min) over 25.6 psi

If measured pressure doesn't satisfy specification, refer to "Diagnostic Flow Chart B-3" and check each possibly defective part. Replace if found defective.

- 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.

Fuel Pressure Gauge Fitting/Plug:

- Install plug at fuel delivery pipe. Use new gasket. Tighten to specified torque.

Fuel Plug Torque (a): 45-55 Nm (4.5 - 5.5 kg/m, 33 - 39.5 lb-ft)

- Turn key ON and engine OFF.
- check for fuel leaks.