Fulltext TSBs

Technical Service Bulletins

TSB
03-21-20
  • ENGINE – 7.3L DIT – GLOW PLUG START-UP ON-TIME DURING COLD TEMPERATURE – SERVICE TIP
Publication Date: October 6, 2003

FORD:
1997 E-350, F SUPER DUTY, F-250, F-350

Article 97-2-14 is being republished in its entirety as part of a consolidated 7.3L diagnostic aid booklet.

ISSUE:

The period of time the 7.3L DIT glow plugs are on during start-up is not printed in 1997 Model Year publications.

ACTION:

The correct glow plug operation information can be referenced in the following Service Procedure.

SERVICE PROCEDURE

Refer to the 1997 Powertrain Control/Emissions Diagnosis (PC/ED) OBD II Service Manual, Pages 4C-22 and 4C-23. On Page 4C-22, the correct specification for glow plug relay on-time is 0-120 seconds. Based on engine oil temperature, compare the on-time to the graph in Figure 1.

NOTE:FOR ALTITUDES ABOVE APPROXIMATELY 2100 METERS (7000 FEET), ADD 5 SECONDS TO GLOW PLUG RELAY ON-TIME, ALTHOUGH MAXIMUM RELAY ON-TIME IS STILL 120 SECONDS.

NOTE:GLOW PLUG ON-TIME IS INDEPENDENT OF GLOW PLUG “WAIT TO START” LAMP TIME. EVEN IF GLOW PLUG RELAY TIME IS ZERO, THE “WAIT TO START” LAMP WILL STILL ILLUMINATE FOR BULB CHECK. THE TIME THAT THE “WAIT TO START” LAMP ILLUMINATES IS FROM 1-10 SECONDS. THIS IS DIFFERENT THAN PREVIOUS MODEL YEARS IN THAT THE LIGHT USED TO STAY ON FOR A LONGER PERIOD OF TIME. REFER TO THE 1997 PC/ED, PAGES 5C-83 THROUGH 5C-90, FOR A COMPLETE DESCRIPTION OF THE GLOW PLUG SYSTEM.

OTHER APPLICABLE ARTICLES:

NONE

SUPERSEDES:

97-2-14

WARRANTY STATUS:

Information Only




Figure 1 – Article 03-21-20


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