Mazda 6 Service Manual: Nonreturn valve inspection

Mazda 6 Service Manual / Fuel and emission control systems / Fuel system / Nonreturn valve inspection

1. Remove the fuel pump unit. (See 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.

Fuel tank 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 connec ...

Fuel line pressure inspection

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 REP ...

Other materials:

Mazda 6 Service Manual: Control system
L.H.D. R.H.D. ...

Mazda 6 Service Manual: No.5 tcs off light does not illuminate with ignition switch on
Diagnostic procedure When performing an asterisked (*) troubleshooting inspection, shake the wiring harness and connectors while doing the inspection to discover whether poor contact points are the cause of any intermittent malfunction. If there is a problem, check to make sure co ...