Mazda RX-8 Manual page 189

Retrieve any DTCs.
Are there any DTCs displayed?
Remove the fuel-filler pipe.
Make sure the nonreturn valve is installed
properly.
2
Inspect the nonreturn valve operation.
Is the nonreturn valve normal?
Verify test results.
•
3
If normal, return to the diagnostic index to service any additional symptoms.
If the malfunction remains, inspect the related Service Bulletins and/or the On-line Repair
Information and perform the repair or diagnosis.
No DTC is displayed:
No
Go to the next step.
Inspect for the following:
Yes Improper use of fuel nozzle
•
Inadequate fuel filling speed
•
Nonreturn valve is installed improperly:
Reinstall the nonreturn valve to the proper
position.
No
Nonreturn valve does not operate properly:
Replace the nonreturn valve.
(w) RX8-Engine Troubleshooting
Page 140