Ford 1996 Bronco Manual page 90

Tachometer (If equipped)
The tachometer will show you the engine's
speed measured in revolutions per minute
(RPM).
The tachometer may move slightly when the key
is placed in the ACC or ON position, with the
engine off. This is normal and does not affect
the performance of the tachometer when the
engine is running.
Some vehicles are equipped with an engine
speed (RPM) limiting device contained within
the Powertrain Control Module (PCM). The
purpose of this device is to maintain peak
engine speed (RPM) below a specified limit. This
feature is only evident on automatic transmission
vehicles when shifting manually (1, 2, D) and on
all manual transmission units. (Engine speed
limits may vary based on engine displacement).
If you are experiencing an "engine cut-out"
condition at high speeds, it may be the result of
this limiting device. It is a normal condition and
can be avoided by reducing vehicle/engine
speed.
Tachometer
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