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Engine - Tip In Hesitation From A Stop

Article No.
93-25-9

12/08/93

HESITATION - TIP-IN HESITATION FROM A STOP WITH ENGINE AT ANY OPERATING TEMPERATURE - 4.9L - EQUIPPED MODELS WITH C-6 TRANSMISSIONS

LIGHT TRUCK:
1992-93 ECONOLINE

CALIBRATION:
2-52L-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:
Tip-in hesitation from a stop with the engine at any operating temperature may be caused by the Powertrain Control Module (PCM).

ACTION:
Refer to the following Diagnosis And Repair Procedure to determine if a new PCM with revised calibration is required.

DIAGNOSIS AND REPAIR PROCEDURE

1. Diagnostic Trouble Code (DTC) check:

a. Refer to the Powertrain Control/Emissions Diagnosis (PC/ED) Car/Truck Service Manual for Malfunction Indicator Lamp (MIL) and DTC concerns.

b. Check for DTC's as directed. If any DTC's are found, they must be repaired before proceeding.

c. If DTC 111 (Pass Code) is found, and the condition still exists, continue with the "diagnostic routines" in Section 2A of the PC/ED before continuing with the following.

2. Powertrain Control Module (PCM) calibrations:

a. Check to see if the vehicle has service replacement PCM part number F3TZ-12A650-ADB installed.

b. If the vehicle already has a service replacement PCM (F3TZ-12A650-ADB) installed, refer to the PC/ED for further diagnostic testing. It is not necessary to replace the PCM a second time.

c. If the vehicle does not have the service replacement PCM installed, install the service PCM (F3TZ-12A650-ADB).

d. Confirm that the customer concern has been corrected.





Powertrain Control Module (PCM) Replacement Chart





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.

PART NUMBER PART NAME CLASS

F3TZ-12A650-ADB Powertrain Control Module A
(PCM)

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

OPERATION DESCRIPTION TIME
932509A Perform EEC Quick Test, 0.8 Hr.
Replace PCM, Perform
Final Quick Test

DEALER CODING
BASIC PART NO. CONDITION CODE
DRIVE 08

OASIS CODES: 611000, 611500, 690000

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