Change fuel injecter - 2003 Ford Expedition

Look.
If you see a fuel rail or a short-throat throttle body, it is fuel injected.
If you see a carburetor... well, I think you get the point :)
From the year (unless it is a non-U.S. model), it is most likely FUEL INJECTED.

Yes. you must change the o-ring too.
DO NOT re-use old o-ring

Check the fuel pressure

This usually happens when the lift pump gets worn and fuel pressure drops below 7lbs and the injection pump has to work harder by pulling in the fuel and will destroy the pump,your is probably a vp44 fuel injection pump it needs replaced and they are expensive 1200.00+ but also change the lift pump or change to a fass fuel system,if the lift pump went out and you replace the injection pump it will ruin it in a short time.
The injection pump is not an easy job to change or for a novice mechanic as it has to be set in time with the engine at top dead center,and then the whole fuel system needs to be bleed of air.

1st check the Fuel Pressure. Often times a fuel injection system fuel Pump ran dry, can more or less implode, the suction becomes too strong and ruins the diaphragm, thus causing low-to-no pressure. faulty fuel pumps can run just slightly under the fuel injection systems Low tolerance, causing the issues that you have mentioned. this is not 100% the answer just a good place to start. Low fuel pressure= change fuel filter, still low pressure= fuel pump. The cheap carport mechanic method would be to change filters first, if the have been changed recently, move toward replacing the Fuel Pump. (some pump are located in the fuel tank, if yours is not your in luck!)

Hello. Replacing the clutch in a 4WD is a pretty big job. Dealerships charge it as a ten hour job. It could take from 8-12. Joe

It depends on which filter you want to change. There are 2 filters, one along the frame, the drivers side
, and the other is on the motor, just before the injection system. If its carborated the fuel filter will be along the frame, if its injected it will be on top of the motor. Theres 2 clamps that hold it in on both types that hold it in. If its along the frame, it will be a steel line into a rubber hose into filter then back into steel. Ifs its injected, it will be infront or back of the injecters.

you should swap complete engines and ecus i have seen this set up installed in a 1938 dodge truck so yes it can be done