Fuel Pressure: Testing and Inspection

CAUTION: A small amount of fuel may be released after fuel line is disconnected. In order to reduce chance of personal injury, cover fitting to be disconnected with a shop cloth. Place that cloth in an approved container when disconnection is completed.

1. Relieve fuel pressure.
2. Separate air cleaner assembly from throttle body and shift its position.

Connecting Fuel Pressure Gauge:

3. Disconnect fuel feed hose from throttle body.
4. Connect special tool (fuel pressure gauge, hose & 3-way joint) between throttle body and fuel feed hose, and clamp hoses securely to ensure no leaks occur during checking.
5. Install air cleaner assembly to throttle body and cylinder head cover.
6. Start engine and warm it up to normal operating temperature.

Removing Fuel Pump Relay:

By-Passing Relay To Operate Fuel Pump:

If engine doesn't start, operate fuel pump according to following procedure.
a) Remove fuel pump relay from main fuse box after disconnecting its coupler and then reconnect coupler to fuel pump relay.
b) To operate fuel pump, connect Pink and White/Blue wire terminals by using service wire and then turn ON ignition switch.

NOTE: Check that battery voltage is 11V or more before operating fuel pump.

7. Measure fuel pressure under each of the following conditions.

CONDITION PRESSURE
AT IDLE 0.9 - 1.4 kg/cm2
90 - 140 kPa
12.8 - 20.0 psi

CONDITION PRESSURE
FUEL PUMP 1.6 - 2.1 kg/cm
ON AND 160 - 210 kPa
ENGINE OFF 22.7 - 29.9 psi

CONDITION PRESSURE
FOR 1 MIN. Over 0.9 kg/cm2
AFTER FUEL 90 kPa
PUMP STOPS 12.8 psi
(PRESSURE
GRADUALLY
REDUCES)




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

8. Relieve fuel pressure.
9. Remove fuel pressure gauge, hose & 3-way joint after removing air cleaner assembly.
10. Connect fuel feed hose to throttle body and clamp it securely.
11. Install air cleaner assembly.
12. Start engine and check for fuel leaks.