Ford Explorer 1999 — technical service bulletin
Bulletin 6643 · NHTSA communication 610717 · issued Jul 1, 1999
Technical service bulletin
communication type
Vehicle Speed Control
component
1999
model years
2
vehicle entries
Official summary
Some vehicles with 4.0l ohv engines built after 6/10/99 at louisville assembly plant or after 6/14/99 at st. Louis assembly plant may exhibit a higher than normal base idle speed of 1400-1600 rpm when the vehicle is initially received from the assembly plant. *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.