1997 Ford F350 Owner Guide 1st Printing - Page 303

By law, anyone who manufactures, repairs, services, sells, leases, trades vehicles, or supervises a fleet of vehicles is not permitted to intentionally remove an emission control device or prevent it from working. In some of the United States and in Canada, vehicle owners may be liable if their emission control device is removed or is prevented from working. Do not drive your vehicle if it does not operate properly. See your dealer if the engine runs on for more than five seconds after you shut it off or if it misfires, surges, stalls, or backfires. Information about your vehicle's emission control system is on the Vehicle Emission Control Information decal located on or near the engine. This decal identifies engine displacement and gives some tune-up specifications. 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). 304