I have talked to quite a few Ford mechanics and everyone one of them has said it was an engine misfire, and they have only seen a select few of vehicles that didn't throw a misfire code. I bought a diagnostic scanner thinking i might see something but no luck. It started raining here where i live today and it seems like it is twice as bad as it was yesterday so My next thing i will be trying is changing out each coil pack until i find one that fixes it. Ill keep updating the forum.