Fuel Return Line: Description and Operation
DESCRIPTIONFlexible Fuel (FF) vehicles use a combination of nylon/stainless steel fuel lines with steel push connect fittings and spring lock couplings. The steel push connect and spring lock couplings used on the FF vehicles have special O-rings for methanol fuel compatibility. The FF vehicles use steel push connect fittings to make the fuel connections to the fuel pump and the drain tube in the fuel tank, fuel filter and the fuel mixer/sensor assembly. Special spring lock couplings with methanol compatible O-rings connect the fuel lines to the engine. Unique nylon vapor connectors are used to connect the vapor management system.