F 350 4WD Pickup V8-7.3L DSL Turbo VIN F (1994)
PROM - Programmable Read Only Memory: All Technical Service Bulletins
Engine - Hard/No Start/Rough Idle/Stalls/Misses
Article No.
96-3-18
01/29/96
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HARD OR NO START - 7.3L DI TURBO - 1994-95 CALIBRATION
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HESITATION - 7.3L DI TURBO - 1994-95 CALIBRATION
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IDLE - ROUGH - 7.3L DI TURBO - 1994-95 CALIBRATION
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LOW POWER - 7.3L DI TURBO - 1994-95 CALIBRATION
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MISSES - 7.3L DI TURBO-1994-95 CALIBRATION
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STALLS - 7.3L DI TURBO - 1994-95 CALIBRATION
LIGHT TRUCK:
1994-95 F SUPER DUTY, F-250, F-350 1995 E-350
This TSB article is being republished in its entirety to update vehicle models and years.
CALIBRATION:
5-89K-R00, 5-90A-R00, 5-90B-R00
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:
Some 1994 and 1995 7.3L DI Turbo Diesels may have diagnostic difficulties or rough idle and performance concerns. These difficulties or concerns
relate to:
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Hard or no start
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Stalls
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Hesitation
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Misses
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Low power
This is due to the limited diagnostics of the 1994 calibration and the diagnostic procedures.
ACTION:
For customer concern vehicles only, reprogram the Powertrain Control Module (PCM) to 1996 level calibration to provide improved diagnostic
capability and performance. Refer to the following Service Procedure for details.
NOTE:
DO NOT REPROGRAM EITHER 1994 SELECTABLE RPM CONTROL VEHICLES OR RYDER, INC. UNIQUE CALIBRATION VEHICLES.
USE THE SUPER STAR II TESTER TO DIAGNOSE THESE VEHICLES.
Updating the calibration will allow the use of New Generation Star (NGS) tester and improved diagnostic procedures in diagnosing the vehicle. This will
also slightly improve idle quality and performance.
SERVICE PROCEDURE
1.
Before servicing the vehicle, check for an Authorized Modifications Decal (FPS 8262) on the fan shroud. Vehicles which have already been
reprogrammed should display a decal.
2.
Connect Service Bay Diagnostic System (SBDS) to the J-1962 On-Board Diagnostics (OBD) II Data Link Connector which is located under the
instrument panel below the glove compartment area.
