Engine Controls - Low Cold Idle Speed/Stalling
Bulletin No: 01-010/02Last Issued: 03/08/2002
Subject:
LOW ENGINE RPM COLD / STALL AT CLUTCH RELEASE
APPLICABLE MODEL(S)/VINs
2001 B4000.
DESCRIPTION
Some 2001 B4000 vehicles may exhibit a low engine RPM during initial cold start up and/or an engine quits upon clutch disengagement or during deceleration. This concern may be caused by a loose PVC Closure Tube at the valve cover and/or the calibration of the Powertrain Control Module (PCM).
Customers having this concern should have their vehicle repaired using the following procedure.
REPAIR PROCEDURE
1. Verify customer concern.
2. Perform normal diagnosis using the Workshop Manual.
- If the condition is corrected, return the vehicle to the customer.
- If the condition is still present, install one hose damp to the PCV Closure Tube where the elbow mates the valve cover.
3. Locate the Catch Word and re-program the PCM only if the Catch Word is listed on the "PCM Calibration Chart".
NOTE:
Obtain the four digit Catch Word. The Catch Word is located on the PCM. See figure shown.
NOTE:
To avoid battery drain, a battery charger should be connected to the battery with a charge rate of no more than 20 amps when performing the "MODULE PROGRAMMING" procedure. More than 20 amps may damage the WDS PTU.
4. Complete an Authorized Modification Label, by entering the date, new calibration number, dealer number, and summary of modifications performed. Clean the area adjacent to the Vehicle Emission Control Information label and install the modification label.
5. Verify repair.
PART(S) INFORMATION
WARRANTY INFORMATION
Note:
This information applies to verified customer complaints on vehicles covered under normal warranty. Refer to the SRT microfiche for warranty term information.
DISCLAIMER