Ford E-150 1997–1998 — technical service bulletin
Bulletin 11496 · NHTSA communication 613754 · issued Apr 1, 1998
Technical service bulletin
communication type
Engine and Engine Cooling
component
1997–1998
model years
4
vehicle entries
Official summary
Some vehicles equipped with the 4.2l engine may exhibit a vibration or boom, off idle between 870 - 900 rpms. *tt
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.