2003 Ford Explorer cylinders 1,2,& 3 are fouling

I want you to check fuel pressure, and fuel pressure drop off. I would like to know if you have fuel injectors that are sticking.

Here is a how to. Remember, pay special attention to the fuel pressure drop off. That is when you shut the key. THe pump stops, but the system should maintain pressure for some time.

https://www.2carpros.com/how_to/how_to_check_fuel_pressure.htm

Let me know what you find.

Joe

I have just checked the fuel pressure, and it has remained the same, it hasn't dropped off....what should I try next resting at 62 lbs of pressure

Okay, that tells us there is no leak at the injectors or other places. I have to ask, does the 2003 have one coil or one for each cylender. Sorry, 7 years ago I knew this but I'm getting old. (LOL)

Joe

It has one coilpack for all six cylinders

Have you checked the oxygen sensor?

I replaced both of them on bank one, and there was no change

The only other thing I can think of is the PCM. For only one side to be running rich, the injectors must be firing more fuel than the other bank.

Is there any way I can test the pcm. Where would you suggest finding one? Does the PCM need to be flashed to my VIN

You will need special test equipment to check that. As far as getting one, I would suggest a salvage yard. However, make sure it has the exact same part number.

Before you go to the trouble of replacing the PCM, I see no mention of retrieving any present trouble codes. Are there any codes present?

I got a run tested pcm from a salvage yard, it has the same numbers exactly, but when i put it in the car would not start.