how to accurately test ECM?

[Tyree]

I used a new distributor, cap, rotor, new wires, and plugs. Originally thought it was low fuel issue...new gas tank and fuel
Sender as well.. I installed new high flow fuel pump with new relay and measured 11 pounds with a tee fitting behind the tbi at idle.. I also did TB rebuild and o-ring kit and cleaned out injectors. I do not have a gauge to measure during load..I have not done leak down. I have 5500 miles on this new engine. The truck was running great for a while and then this symptom came up.. it is random and intermittent... it does not send any new error codes with the poor acceleration and bogging out? I can connect to tuner pro and watch diagnostics while trucknis running and I am also able to get a 12 when I switch attempt to read codes... this is why I am skeptical of the ECM being faulty.. I do not have a second ECM to swap.

[Tyree]

Two years and 5500miles on new engine

[uncabob]

Had heavy acceleration problem with one of my Explorers. Turned out to be the inline fuel filter. Could yours be that simple?
Bob

[Tyree]

I installed a brand ne filter as well.. I was hoping it would be something simple but it is turning out to be a phantom