Have Ford Questions? Ask a Mechanic for Answers ASAP
Have you been able to check for any trouble codes in the PCM (Engine Computer)? If you do not have a code reader, some auto parts stores do rent and/or loan them out.
The trouble codes will point out what is causing the problem.
Get the codes and post them on this page.
Without the trouble codes, we are only guessing and that an get expensive.
When we get any Fords in the dealership for driveabilty problems, the first thing we do is check for trouble codes. The days of simple guessing are long gone. Way too many modules and sensors in the systems now. You problem could be caused by fuel pressure, the throttle body, the PCM itself, or a simple sensor. It is hard to tell.
We can talk back and forth to resolve your Expeditions problem. You can get the codes and post them tomorrow on this page. I can help you work through and find the problem.