idling rough small tapping sound loss of power

What is your question?

My truck started idling rough and it has a knock to it but its not the rods its driving right now but it had 2 quarts to much oil. It has low power I wanna say its the lifters but not sure I have someone looking at it but hes tryinn to over charge me

What makes this problem better or worse?

idk

How long has your 2003 Ford Expedition had this problem?

months