MX-5 Miata Mazdaspeed L4-1.8L DOHC Turbo (2004)
Rollover Valve: Testing and Inspection
FUEL SHUT-OFF VALVE/ROLLOVER VALVE INSPECTION
CAUTION: Disconnecting/connecting the quick release connector without cleaning it may possibly 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.
1. Disconnect the plastic fuel hose and the FP unit connector. (See FUEL PUMP (FP) REMOVAL/INSTALLATION.)
2. Remove the fuel tank with the FP unit. (See FUEL TANK REMOVAL/INSTALLATION.)
3. Plug the fuel main pipe and fuel return pipe of the FP unit.
4. Plug port A.
5. Level the fuel tank.
6. Blow through port B and verify that there is airflow from port C.
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If there is no airflow, replace the fuel tank.
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If there is airflow, plug port C and proceed to Step 7.
7. Blow through port B and verify that there is airflow from port A.
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If there is no airflow, replace the fuel tank.
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If there is airflow, turn the fuel tank upside-down, and proceed to Step 8.
8. Blow through port B and verify that there is no airflow from port A.
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If there is airflow, replace the fuel tank.
