Fuel Supply Line: Description and Operation

WARNING: FUEL SUPPLY TUBES ON VEHICLES EQUIPPED WITH FUEL INJECTED ENGINES WILL REMAIN PRESSURIZED FOR LONG PERIODS OF TIME AFTER ENGINE SHUTDOWN. THE PRESSURE MUST BE RELIEVED BEFORE SERVICING THE FUEL SYSTEM OR PERSONAL INJURY OR DAMAGE TO VEHICLE MAY OCCUR.

EFI systems are equipped with an electric fuel pump that provides fuel to the engine at higher pressure than conventional fuel systems. A fuel return system is also provided. All fuel hose/tube connections are made with push connect fittings and all flexible hoses are serviced as assemblies. The metal tubes attached to the vehicle underbody may be serviced and repaired. The metal underbody tubes must be cut and formed out of rolls of fuel system service tubing available at dealerships.

All replacement flexible hoses MUST be serviced as assemblies. Refer to Push Connect Fitting Installation for connecting procedure.
Bulk fuel flexible hose must NOT be used to service tubing in high pressure fuel systems.