Q: How to replace and prime the fuel filter for a Ford Bronco II 2.3L engine?
A: Disconnect both battery ground cables for a 2.2L engine. Disconnect and cap the fuel filter inlet and outlet lines. Remove the two bolts/nuts attaching the priming pump to the bracket and remove the pump. Remove the two bolts attaching the bracket to the engine and remove the bracket. Install the fuel filter mounting bracket on the engine. Install the priming pump assembly on the bracket. Install the fuel filter lines and clamps. Connect both battery ground cables. Run the engine and check for fuel leaks. For a 2.3L diesel engine, the fuel filter is the paper element cartridge type and the conditioner housing includes an air vent screw to bleed air from the fuel lines. Remove the rear bracket shield, attaching bolts, and unplug the electrical connectors attached to the shield. Remove the rectangular filter element cartridge by unlatching hold-down clamps and pull element cartridge rearward until it clears the base. Clean the filter mounting pad. Install the new element by pushing straight on after lining up filter element grommet holes with corresponding inlet/outlet tubes on the base. Snap on the clamps. Install the rear bracket shield, tighten the bolts to specification and plug the electrical connections back together. For a 2.3L engine frame-mounted inline fuel filter, pinch off the fuel hose to the rear of the inline filter using a rubber coated clamp or other suitable device to prevent fuel from siphoning from the tank. Remove the two hose clamps closest to the inline filter and remove filter. Install replacement filter and two new clamps. Remove the hose pinch-off clamp. To purge air and prime fuel filter for a 2.3L engine, turn the ignition switch ON to activate the electric fuel boost pump. Loosen the air vent plug on the conditioner housing until fuel flows from the air vent plug hole free of bubbles. Tighten the air vent plug securely. Start the engine and check for leaks.