How do you bleed air from fuel diesel system of Isuzu 4jx1?

To bleed air from the fuel system of an Isuzu 4JX1 diesel engine, first, ensure the fuel tank is full and the ignition is off. Locate the bleed screw on the fuel filter, usually found near the top. Use a wrench to loosen the screw and pump the primer bulb until fuel flows without air bubbles, then tighten the screw. Finally, start the engine and let it run for a few minutes to ensure all air is expelled from the system.