Fuel Vapor Rollover Valve - Millenia
WARNING: This page is about a different car, the 2001 Mazda Protege, 2001 Mazda Millenia, 2001 Mazda MX-5 Miata, 2001 Mazda MPV, and 2001 Mazda 626. However, it is still accessible from the selected car via links, so may be relevant.
Vehicle is equipped with 2 fuel vapor valves, built into top of fuel tank. With fuel vapor rollover valve in upright position, air should flow through valve. With fuel vapor rollover valve turned upside down (with fuel tank), air should not flow through valve. If fuel vapor rollover valve does not operate as specified, replace fuel tank.