I have a 2005 expedition 5.4 24 valve......
For the past 2-3 months i have had what i describe as a "stutter" or "cutting out" when i am just under power.....I have changed the fuel filter (and it was nasty) and have been putting SeaFoam in for about the last 6 fillups. I still get that choppy cutting out when just under power. I cannot get the check engine light to come on so i can pull a code......Otherwise, it starts without hesitation and idles smooth with no miss at all......Any ideas????

 

Regarding the fuel filter, not sure what you mean by nasty, but if it was full of rust, dirt etc., I would consider changing it again. If it still comes out nasty there is some problem as to why that has happened and should be addressed.
You didn't state what the current mileage was on the vehicle, but an '05 , well it has to be near 100,000 or close to it. The coils on those engines can drive you nuts because once they start to fail they generally don't stop. Every few thousand miles another one will act up. If ignored, a faulty coil can send a voltage spike into the system and can wipe out the PCM. It's cheaper to replace the coils (all of them) than a PCM.
I would suggest that you have someone who can use a scope and confirm if there is a coil problem or not. Diagnostic time is not cheap, but it's a lot cheaper in the long run than waiting for the bottom to fall out of the system.