Float Test
- Make sure the fuel tank is less than half full.
- Remove the fuel fill cap to relieve the fuel tank pressure, then reinstall the cap.
- Remove the fuel pipe cover. Disconnect the fuel tank vapor recirculation tube (A), and connect a commercially available vacuum pump/gauge, 0-30 in.Hg, to the hose.
- Plug the fuel tank vapor recirculation pipe (B).
- Apply vacuum to the fuel tank vapor recirculation tube (A).
- If the vacuum holds, replace the fuel tank vapor control valve (see FUEL TANK VAPOR CONTROL VALVE REPLACEMENT ).
- If the vacuum does not hold, the float is OK. Go to step 1 of the valve test.