Ford E6TZ-9K044-A Fuel Reserve Tank

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If a fuel tank has sediment or rust, it must be removed and cleaned. Flush it with hot water and detergent or send it to a radiator shop for chemical flushing. Plastic tanks cannot be repaired; they must be replaced if damaged. Use chemical sealant for on-vehicle repairs only in emergencies. Remove and send the tank to a shop for permanent repairs. Never store a gas tank in an enclosed area to avoid explosions or fires.

Commonly used in early fuel-injected models with single tanks, high and low-pressure fuel pumps, the single-function fuel tank is an intermediary between a low-pressure pump and a high-pressure one. The fuel tank receives fuel from the low-pressure pump and transfers it to the high pressure one then to the EFI system while the extra fuel flows back to the tank via this same fuel tank. In cases where there is an inadequate supply of fuel by the low-pressure pump, the high-pressure pump will draw gasoline from this fuel tank to sustain uninterrupted flow of gasoline to the engine. For troubleshooting, check for any fuel blockage, since servicing cannot be done on this fuel tank.

The fuel tanks in these vehicles, made of metal or plastic, are positioned midship or aft-axle. Optional auxiliary tanks may be present. Plastic tanks, if damaged, should be replaced. For midship tanks on fuel-injected models, fuel system pressure must be relieved before disconnecting the battery and draining fuel. The tank is lowered after removing hoses, filler pipes, and electrical connectors, with the fuel level sending unit/fuel pump and vapor control valve removed if replacing the tank. The process for aft-axle tanks involves draining fuel, disconnecting hoses and electrical connectors, and lowering the tank while supporting it, with additional steps for metal or plastic tanks. Bronco models follow a similar procedure with specific steps for their configuration, including the removal and installation of the vapor emissions control valve for tank replacement. Precautions, such as resetting the inertia switch on fuel-injected models, should be observed during installation.

To remove and install the tank assembly on various Ford models such as Ranger models with center mount fuel tanks, dual fuel tanks at the rear (dual tanks), and Bronco II models, perform these general steps. First things first, drain the fuel out of the tank and if necessary remove the skid plate or support. There are several hoses and lines connected to the tank including a fuel filler pipe hose, a vent hose, all of which need to be disconnected. Remove the fuel gauge sending unit along with its gasket if necessary. Finally, you can release any mounting straps or brackets that hold up the tank. Lower the tank gently from the vehicle.

The dual-function reservoir performs similar functions as the single reservoir but also incorporates internal valving for mechanical switching of fuel tank supply and return lines.

A gas tank should never be stored in an enclosed area where gas fumes could build up and cause an explosion or fire.

The fuel tanks are positioned either midship, between the driveline and frame rail, or aft-axle, situated between the frame rails and behind the rear axle.