Fulltext TSBs

Technical Service Bulletins

TSB
03-21-31
  • ROUGH IDLE – INJECTOR BORE SCUFFING DURING ENGINE BREAK-IN PERIOD – SERVICE TIP
Publication Date: October 6, 2003

FORD:
1994-1997 F-250 HD
1994-1998 F-350
1995-1998 ECONOLINE
1999 F-250 HD, SUPER DUTY F SERIES

Article 98-20-5 is being republished in its entirety as part of a consolidated 7.3L diagnostic aid booklet.

ISSUE:

Some 7.3L DIT engines exhibit rough idle and engine miss due to injector bore scuffing at green engine break-in. This may be due to insufficient lubricity additive in some fuels.

ACTION:

For injectors serviced in the field, one bottle (12 ounce) of Diesel Fuel Lubricity Additive (F8AZ-9C077-AA) must be added to the engine fuel tank at the time of injector replacement. The additive has been shown to be effective in preventing premature wear during the injector break-in period.


PART NUMBERPART NAME
F8AZ-9C077-AADiesel Fuel Lubricity Additive

OTHER APPLICABLE ARTICLES:

NONE

SUPERSEDES:

98-20-5

WARRANTY STATUS:

Information Only


NOTE: The information in Technical Service Bulletins is intended for use by trained, professional technicians with the knowledge, tools, and equipment to do the job properly and safely. It informs these technicians of conditions that may occur on some vehicles, or provides information that could assist in proper vehicle service. The procedures should not be performed by “do-it-yourselfers”. Do not assume that a condition described affects your car or truck. Contact a Ford, Lincoln, or Mercury dealership to determine whether the Bulletin applies to your vehicle.

Copyright 2003 Ford Motor Company