Civic DX Coupe L4-1590cc 1.6L SOHC MFI (1999)
Refueling Control Valve: Testing and Inspection
Float Test
Float Test
1. Make sure the fuel tank is less than half full.
2. Remove the fuel fill cap to relieve the fuel tank pressure, then reinstall the cap.
3. Remove the fuel hose joint protector. Disconnect the ORVR vapor recirculation hose, and connect a vacuum pump to the vapor recirculation hose.
4. Plug the hose port.
5. Apply vacuum to the ORVR vapor recirculation hose.
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If the vacuum holds, replace the ORVR vent shut valve.
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If the vacuum does not hold, the float is OK.
