One problem related to engine shut off without warning has been reported for the 1999 Ford F-250. The most recently reported issues are listed below.
While driving ,the truck just shuts down losing all power steering and brakes. This happened while in left hand turn with a semi tractor trailer right beside me. There have been several occasions this has happened. My mechanic has replaced the cps (cam position sensor) twice in the last two months. It seems to fix it for a while but the problem resurfaces without warning. I have found online that many people are having the problem.