PCM - Intermittent Steady Speed Stumble

Bulletin No.: 009/97
Issued: 04/08/97
Revised

Category
F

Applicable Model/s
1995-96 B-Series

Subject:
INTERMITTENT STEADY SPEED STUMBLE AT HIGHWAY SPEEDS (55 MPH and ABOVE)

APPLICABLE MODELS
All 1995-96 B-Series with calibration codes listed in the Parts Information.

IMPORTANT:
This repair is not authorized for vehicles with other than the listed calibration codes. Performing this repair on other engine calibrations is unauthorized and may be in violation of state and federal law.

DESCRIPTION

An intermittent steady speed stumble may be experienced at highway speeds. This stumble is felt as a momentary loss of power or a miss. The stumble may be caused by the Powertrain Control Module (PCM) sending the wrong signals to the fuel injectors. A modified PCM is available to connect this concern.

Customers complaining of this concern should have the vehicle inspected and if necessary, repaired according to this bulletin.

REPAIR PROCEDURE

1. Confirm that the vehicle calibration code is listed in the Parts Information section of this bulletin, and that the vehicle does not have the latest PCM calibration already installed. Refer to the Parts Information.

^ If the vehicle has one of these calibrations and there is no "Authorization Modification Decal" on the radiator support indicating this bulletin number, proceed to step 2.

^ If the vehicle does not have one of these calibrations or has already had the modified PCM installed, refer the workshop manual for troubleshooting and repair information.

NOTE:
The calibration code is located on the driver's side "B" pillar.

2. Perform KOEO and KOER self-diagnostic procedures. Refer to section F of the workshop manual.

^ If any DTCs are present, repair as necessary.

3. Verify that the concern occurs intermittently and only at a steady highway speed.

^ If the concern does not occur, return the vehicle to the customer.

^ If the concern is present, proceed to step 4.

4. Install the modified PCM. Refer to the Parts Information section for correct part usage.

5. List the date, dealer number and Service Bulletin number on the "Authorized Modification Decal" and install decal on radiator support.

NOTE:
This decal informs technicians of the PCM change if future repairs are necessary.

6. Confirm the repair and that all DTCs are cleared from PCM memory.











PARTS INFORMATION - Parts Numbers listed are Powertrain Control Modules, each quantity is one.

WARRANTY INFORMATION

(Applies To Verified Customer Complaints On Vehicles Covered Under Normal Warranty Refer To The SRT Microfiche For Warranty Term Information.)

Warranty Type: A

Symptom Code: 08

Damage Code: 9W

Part Number Main Cause: Refer to Parts Information

Quantity: 1

Operation Number/Labor Hrs: F0812XRX / 0.4 Hrs. PCM R&R
F0008XDX /1.8 Hrs. Maximum Diagnostics





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