On-Board Refueling Vapor Recovery (ORVR) System (If Equipped)Fuel Injectors

The on-board refueling vapor recovery (ORVR) system recovers fuel vapors during the vehicle refueling operation. The flow of liquid fuel down to the fuel tank filler neck provides a liquid seal. The purpose of ORVR is to prevent refueling vapor from exiting the fuel tank filler neck. The ORVR components are listed below, with a brief description of their operation:

• The fuel tank - The fuel tank contains the modular fuel sender, the fuel limiter vent valve (FLVV), and 1 rollover valve.
• The check valve - The check valve limits fuel spit-back from the fuel tank during the refueling operation by allowing fuel flow only into the fuel tank. The check valve is located at the bottom of the fuel filler pipe.
• The fuel limit vent valve (FLVV) - The FLVV acts as a shut-off valve. The FLVV is located in the fuel tank. This valve has the following functions:
  • Controlling the fuel tank fill level by closing the primary vent from the fuel tank
  • Preventing fuel from exiting the fuel tank via the vapor line to the canister
  • Providing fuel spillage protection in the event of a vehicle rollover by closing the vapor path from the tank to the engine