F 250 2WD HD Pickup V8-7.3L DSL Turbo VIN F (1997)
PROM - Programmable Read Only Memory: Customer Interest
Diesel Engine - Stalls On Long Deceleration Conditions
Article No.
98-4-14
03/02/98
STALL - DURING LONG DECEL CONDITIONS WHILE
IN MANUAL 1 OR MANUAL 2 GEAR - VEHICLES
EQUIPPED WITH E4OD TRANSMISSION AND
CALIFORNIA CALIBRATION 7.3L DIT ENGINE
LIGHT TRUCK:
1997 F-250 HD, F-35O
This TSB article is being republished in its entirety to correct the New Calibrations" listed in the PCM Calibration Reference Chart.
CALIBRATION: 7-90P-R10, 7-90P-R11
WARNING:
THIS MODIFICATION IS AUTHORIZED ONLY FOR THE LISTED ENGINE. PERFORMING THIS MODIFICATION ON OTHER ENGINE
CALIBRATIONS IS UNAUTHORIZED AND COULD CREATE LIABILITY UNDER APPLICABLE FEDERAL OR LOCAL LAWS.
ISSUE:
An engine stall condition may occur on some 1997 California F-Series 7.3L Diesel E4OD vehicles after a long decel when using M1 gear for engine
braking. When upshifting after the decel, the engine may stall if it is at approximately 1000 rpms (10 mph). This may be caused by the Powertrain
Control Module (PCM) calibration.
ACTION:
Reprogram the PCM. The revised calibration modifies the fuel control governor to reduce the possibility of stall. Refer to the following Service
Procedure for details.
SERVICE PROCEDURE
1.
Perform normal diagnostics as outlined in the 1997 Powertrain Control/Emissions Diagnosis (PC/ED) On-Board Diagnostics II (OBD-II) Service
Manual and service as required.
2.
If the concern still exists, reprogram the PCM using the latest level CD-ROM and Service Bay Diagnostic System (SBDS) or New Generation Star
(NGS) Tester. Refer to the following PCM Calibration Reference Chart for the correct calibration.
NOTE:
PCM REPLACEMENT IS NOT AUTHORIZED BY THIS TSB. REFER TO THE POWERTRAIN CONTROL/EMISSIONS DIAGNOSIS
(PC/ED) SERVICE MANUAL FOR APPROPRIATE DIAGNOSTIC PROCEDURES IF PCM HARDWARE CONCERNS EXIST.
