Liquid Vapor Separator: Description and Operation

Evaporative Emission Components:

DESCRIPTION
The evaporative emission valve performs its function within the Evaporative Emissions (EVAP) system as follows:
- The evaporative emission valve is mounted in a rubber grommet at a central location in the upper surface of the fuel tank.
- The evaporative emission valve uses a small orifice and shut off valve to allow only fuel vapor to pass into the evaporative emission hose and onto the evaporative emissions canister (EVAP canister).
- A vapor space between the fuel level and the fuel tank upper surface is combined with an orifice and float shut-off valve in the evaporative emission valve to prevent liquid fuel from passing to the evaporative emission tube shut off valve and the evaporative emissions canister.
- The vapor space also allows for thermal expansion of the fuel.

NOTE: Vehicles equipped with a 68 liter (18 gallon) fuel tank require the use of two evaporative emission valves. Vehicles equipped with a 61 liter (16 gallon) fuel tank use only one evaporative emission valve.