Engine - Stalls After Cold Start

Article No.
94-2-21

01/26/94

STALLS - AFTER COLD START - ALL 4.0L RANGER MODELS AND ALL EXPLORER MODELS EXCEPT 49S A/T

LIGHT TRUCK:
1993 EXPLORER, RANGER

CALIBRATION:
3-57F-R00, 3-57H-R00, 3-57S-R00, 3-57T-R00, 3-58F-R00, 3-58H-R00, 3-58S-R00, 3-58T-R00, 3-58U-R00, 3-57R-R00, 3-58P-R00, 3-58R-R00, 3-57B-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:
Cold start stalls may occur on M/T, and cold engagement stalls may occur on A/T, once per warm-up cycle, due to calibration sensitivity to available fuels.





ACTION:
Perform normal diagnostic procedures. Refer to the 1993 Powertrain Control/Emissions Diagnosis Service Manual (PC/ED) for procedures. If a problem still exists, replace the Powertrain Control Module (PCM) with a revised PCM which will enrich the system during crank, underspeed, start-up open loop and A/T engagement modes. Refer to the the Vehicle Application Chart And Parts Block for correct part application.





Obtain an Authorized Modifications Decal and list the date, dealer number, and summary of alterations performed. Select a prominent place adjacent to the Vehicle Emission Control Information Decal suitable for installing the Authorized Modifications Decal. Clean the area, install the decal, and cover it with a clear plastic decal shield.

OTHER APPLICABLE ARTICLES: NONE
WARRANTY STATUS:
Eligible Under The Provisions Of Bumper To Bumper Warranty Coverage

OPERATION DESCRIPTION TIME
940221A Perform EEC Diagnosis, 0.8 Hr.
Replace PCM, Run Final
Quick Test

DEALER CODING
BASIC PART NO. CONDITION CODE
RECAL 08

OASIS CODES: 602300, 607400