Fuel Return Line: Description and Operation

PURPOSE/OPERATION
The Fuel Line system utilizes three sets of fuel lines located underneath the vehicle on the left side.

Fuel Feed (Supply) Line
The Fuel Feed (Supply) Line delivers fuel pressurized by the in-tank electric fuel pump from the fuel tank. The fuel is fed into the fuel filter, from there to the fuel rail.

Fuel Return Hose
This line is connected between the fuel pressure regulator and the fuel tank. When the fuel rail pressure exceeds the specified amount, the pressure regulator opens and bleeds the excess fuel through this line and back into the fuel tank.

Fuel Vapor Line
This line is connected between the fuel tank and the charcoal canister for evaporative emissions control. The Fuel Vapor Line is connected to the fuel cut-off valve at the top of the fuel tank. When the vapor pressure in the fuel tank exceeds the specified value of the two-way valve, the two-way valve opens and purges the vapors to the charcoal canister through the fuel cut-off valve, fuel/vapor separator and the Fuel Vapor Line.