Fuel Shut-Off/Rollover Valve Inspection

WARNING: This page is about a different car, the 2005 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION:

Disconnecting/connecting the quick release connector without cleaning it may cause damage to the fuel pipe and quick release connector. Always clean the quick release connector joint area before disconnecting/connecting using a cloth or soft brush, and make sure that it is free of foreign material.

NOTE:

This inspection is for fuel shut-off valve and two rollover valves integrated in the fuel tank.

Disconnect the plastic fuel hose and the fuel pump unit connector. (See FUEL PUMP UNIT REMOVAL/INSTALLATION .)
Remove the fuel tank with the fuel pump unit. (See FUEL TANK REMOVAL/INSTALLATION .)
Plug the fuel pipe of the fuel pump unit.

Fig 1: Identifying Fuel Pump Unit
Courtesy of MAZDA MOTORS CORP.
Level the fuel tank.
Blow through port B and verify that there is airflow from port A.
- If there is no airflow, replace the fuel tank.
- If there is airflow, turn the fuel tank upside down, and proceed to Step 6.
  
  Fig 2: Identifying Fuel Pump Unit
  Courtesy of MAZDA MOTORS CORP.
Blow through port B and verify that there is no airflow from port A.
- If there is airflow, replace the fuel tank.

TYPE A: The rollover valve is located on the external wall of the fuel tank.

TYPE B: The rollover valve is located inside the fuel tank.