One problem related to loud engine noise has been reported for the 2004 Ford F-250. The most recently reported issues are listed below.
The contact owns a 2004 Ford f250 super duty. While exiting the highway at 60 mph, the contact heard a loud noise. He drove slowly to an authorized dealership where the contact was informed that the right spark plug had come out of place. The current and failure mileages were approximately 84,000. Updated 10/13/10. Updated 10/19/jb.