Mazda 2002 6 - Nonreturn Valve Inspection; Fuel Line Pressure Inspection

F–20
FUEL SYSTEM
8. Turn the fuel tank upside-down and apply
pressure of –2.0 kPa {–15 mmHg, –0.6 inHg} to
port A.
(1) Plug port C and verify there is no vacuum
from port B.
• If there is vacuum, replace the fuel tank.
End Of Sie
NONRETURN VALVE INSPECTION
A6E391242270W01
1. Remove the fuel pump unit. (See F–22 FUEL PUMP UNIT REMOVAL/INSTALLATION.)
2. Siphon the fuel from the fuel tank.
Note
• Nonreturn valve is integrated in the fuel tank.
• The nonreturn valve is normally closed by the spring force.
3. Verify that the nonreturn valve is closed.
• If the nonreturn valve is stuck open and dose not open even when pulled up by a finger, replace the fuel
tank.
End Of Sie
FUEL LINE PRESSURE INSPECTION
A6E391201006W03
Warning
• Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death.
Fuel can also irritate skin and eyes. To prevent this, always complete the “BEFORE REPAIR
PROCEDURE”. (See F–17 BEFORE REPAIR PROCEDURE.)
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 cloth or soft brush, and make sure that it is free
of foreign material.
1. Complete the “BEFORE REPAIR PROCEDURE”.
(See F–17 BEFORE REPAIR PROCEDURE)
2. Disconnect the negative battery cable.
Caution
• The quick release connector may be damaged if the tab is turned too far. Do not turn the tab over
the stopper.
3. Disconnect the quick release connector from the fuel tank as follows:
(1) Push the tab on the locking coupler 90 degrees until it stops.
(2) Pull the fuel hose straight back.
A6E3912W046