Ford Ranger 1994 — technical service bulletin
Bulletin 95209 · NHTSA communication 46475 · issued Oct 1, 1995
Technical service bulletin
communication type
Power Train
component
1994
model years
1
vehicle entries
Official summary
Spark knock/detonation may occur while cruising or accelerating at highway speeds w/ ambient temps of 70 degrees f (21 degrees c) or higher. This is due to too much spark advance. Replace the powertrain control module (pcm) w/ a revised pcm.
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.