Hey everybody I'm new here as I am the proud new owner of my dad's '02 F-150 5.4l supercrew. Its got about 100,000 miles and still drives excellent. Okay now here's my question; when driving, from 1500 to about 2000 rpm, there is a loud buzzing/rattling coming from the dash/engine bay. It only does this in that rpm range and in light acceleration or cruising. Under heavy accel. it doesn't happen. Anybody have any ideas as to what causes this or have any solutions?