One problem related to diesel engine has been reported for the 1997 Ford F-150. The most recently reported issues are listed below.
Rear window has a leak on the passenger side of the sliding window that has been sent back to the shop several time for repairs. Its on oing ! the window has been replaced w/ frame three times , but the truck has been in shop several times prior to and after the windows have been replaced. It would last a short time and would then start leaking all over again. ** presently still leaking **. # 2 . Engine has a knock during start up. Sounds more like a diesel ! both issues have been present since 14,000 miles or so. This truck has had several problems. To mention a few ; rear bumper rusting out, door & shift nobs breaking , body paint peeling, rattle in floor gear shift ( still present ), ** now the air conditioning is not working **. I like the truck, but would rather have one with out all the problems !.