Float Test

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2005 Honda S2000, 2004 Honda S2000, 2003 Honda S2000, 2002 Honda S2000, and 2001 Honda S2000. However, it is still accessible from the selected car via links, so may be relevant.

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.

Fig 1: Disconnecting Fuel Tank VAPOR Recirculation Tube
Courtesy of AMERICAN HONDA MOTOR CO., INC.
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.