Do Not Tamper With The Noise Control System - Ford Vehicle Owner's Manual

NOTE: All current model year vehicles are
certified to the same year emissions
standards except certain vehicles
equipped with engines built prior to
January 1 of the model year which may
be certified to prior year emissions
standards. In either case, the
maintenance schedules contained in the
back of this Owner Guide must be
used to maintain your engine.
Noise emissions warranty, prohibited
tampering acts
On January 1, 1978, Federal regulations became
effective governing the noise emissions on trucks
with a GVWR of over 10,000 lbs (4,536 kgs). The
following statements concerning prohibited
tampering acts and the noise warranty are found
in the Warranty Information Booklet, and are
applicable to completed F-Series chassis cabs
whose GVWR is over 10,000 lbs (4,536 kgs).
Do not tamper with the noise control
system
Federal law prohibits the following acts:
1. The removal or dismantlement, (by any
person unless for maintenance, repair or
replacement purposes) of any device or
design element incorporated into any new
vehicle to control noise output, prior to its
sale or delivery to the consumer, or while it
is being used, or
2. Using your light truck after a device or
design element has been removed or
dismantled, by any person.
373