One problem related to engine clicking and tapping noises has been reported for the 2003 Ford F-350. The most recently reported issues are listed below.
I'm sure I have the same problem. I heard a ticking noise also, then my truck started to miss under load. Unable to determine which cylinder is the problem, sounds like all my be bad at some time. Ford has to be aware of this problem, not taking the blame is an example of how they run their business. Ooohhhh wait they are getting ready to go under. Wonder why????.