Fuel Delivery and Air Induction: Description and Operation

FUEL DELIVERY SYSTEM - GENERAL INFORMATION
The in-tank fuel pump module contains the fuel pump and pressure regulator. The pump is serviced as part of the fuel pump module.

The fuel delivery system contains a replaceable inline filter. The filter attaches to the frame above the rear of the fuel tank.

Relieve fuel system pressure before servicing fuel system components. Refer to the Service and Repair/Fuel System Pressure Release Procedure and follow all Cautions and Warnings. Service and Repair

Most fuel system components attach to the fuel lines with quick connect fittings. Refer to Service and Repair/Quick Connect Fittings in this section. Service and Repair

Fuel Pump Module
The in-tank fuel pump module contains the fuel pump and pressure regulator. The pump is serviced as part of the fuel pump module.

In-line Filter
The fuel delivery system contains a replaceable in-line filter. The filter attaches to the frame near the fuel tank.

System Pressure
Relieve fuel system pressure before servicing fuel system components. Refer to the procedure and follow all Cautions and Warnings. Most fuel system components attach to the fuel lines with quick connect fittings.

Tank and Delivery System
The fuel tank and fuel delivery system are equipped with fuel and vapor controls that allow the vehicle to pass a full 360° rollover.

Pressure Relief/Rollover Valve
The fuel delivery system has a pressure relief/roll-over valve mounted in the fuel filler tube and on top of the fuel tank. The valve functions as a pressure relief valve while the vehicle is upright. The valve also contains a check valve that prevents fuel from escaping if the vehicle turns over.

Filler Cap
The fuel filler cap also acts as a pressure/vacuum valve. When pressure inside the fuel tank gets too high or too low, the fuel filler cap opens to relieve the difference in air pressure.

Evaporation Control System
An evaporation control system restricts fuel evaporation into the atmosphere and reduces unburned hydrocarbons. Vapors from the fuel tank are collected in a charcoal filled canister. The vapors are held in the canister until the engine is operating. When the engine operates, vapors are drawn through the intake manifold into the combustion chambers.