Expedition 2006 Jaloneo when walking

I hope someone can help me, I have a 2006 expedition that pulls when walking, before it was only when I accelerated strong and the overwater entered, now it does it at any speed while accelerating.
Check Engine witness was turned on, scanned and frame failure in Cilidro 5,
a spark plug was changed to that cylinder and disappear the failure temporarily and the witness went out.
When making the fault again, I did not turn on the check Engine, it was scanned again and frame failure in coils from 5 to 8, changed coils but the fault continues, they were cleaned and calibrated injectors, coil tests, repair to gasoline pump and the fault continues to do it.
Someone knows what the cause could be

You mediate cylinder compression to rule out motor failure