Fuel Pump - Mazda 626 MX-6 Workshop Manual

4B
FUEL SYSTEM
4B—64
Fuel Line Pressure
1. Start the engine and run it idle.
2. Set the lever on the adapter as shown in the figure.
3. Check the fuel line pressure.
Fuel line pressure: Approx- 186—226 kPa
(1.9—2.3 kg/cm2, 27—33 psi)
4. If not within specification, check the vacuum hose.
86U04A-077
5. Disconnect the vacuum hose from pressure regu­
lator, and place a finger over the end of the hose.
6. Check the fuel line pressure.
Fuel line pressure: 235—275 kPa
(2.4—2.8 kg/cm2, 34—40 psi)
7. If not within specification, replace the pressure
regulator.
8. Connect the vacuum hose to pressure regulator.

FUEL PUMP

Operation Test
1. Connect a jumper wire to the check connector
(Yellow).
2. Remove the fuel filler cap.
3. Turn the ignition switch ON.
4. Listen for operational sound of the fuel pump at
the filler inlet.
5. Install the fuel filler cap.
6. If no sound was heard, check the voltage at the
feel pump connector (WY wire and a ground).
Voltage: 12V
7. If the voltage is normal, replace the fuel pump.
8. If not correct, check the circuit opening relay (Re­
fer to page 4B—102) and its circuits.
9. Disconnect the jumper wire.