Fuel Fill Check Valves
WARNING: This page is about a different car, the 1995 Plymouth Voyager, 1995 Plymouth Grand Voyager, 1995 Dodge Grand Caravan, and 1995 Dodge Caravan. However, it is still accessible from the selected car via links, so may be relevant.
Two different check valves are used with the CNG fuel system. One of the valves is located integrally with fuel fill receptacle. The other valve is located in fuel fill tube near top of left rear shock absorber. Both valves are used to keep fuel from escaping from fuel fill receptacle.