NHTSA ID Number: 11010231
Manufacturer Communication Number: TSB240207
TSB/Document Date: 2024-11-07
Summary
This Technical Service Bulletin describes the troubleshooting and repair steps for the internal spring within the fuel control valve which may relax over time, resulting in the fuel control valve struggling to meet low fueling rates at an idle speed of 700 rpm.
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TSB/Document ID: TSB240207
Replacement Service Bulletin Number:
MFR Communication Date: 2024-10-23
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ENGINE
MFR Component System:
MFR Component Subsystem:
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11/5/24, 10:50 PM
Misfire and Engine Speed Surge at Idle
Technical Service Bulletin
Technical Service Bulletin: TSB240207
Misfire and Engine Speed Surge at Idle
Released Date: 22-Oct-2024
Misfire and Engine Speed Surge at Idle
Warranty Statement
The information in this document has no effect on present warranty coverage or repair practices,
nor does it authorize TRP or Campaign actions.
Contents
Product Affected
B6.7N CM2380 B150B
Issue Summary
Symptom:
Fault Code 5914
Runs rough or misfire
Engine speed surges/speed erratic
Root Cause:
Fuel control valve internal spring can relax over time causing the fuel control valve to struggle to
meet low fueling rates at an idle speed of 700 rpm.
Verification/Confirmation
Verify Fault Code 5914 and one of the listed symptoms, and the misfire is occurring at idle
speed.
Verify the idle speed is set below 800 rpm.
Verify the application is compatible with the higher idle speed.
Resolution
If misfire is occurring at idle the idle speed can be changed to 800 rpm.
Do not replace the fuel control valve unless directed by published troubleshooting.
Connect all components.
Connect the recommended Cummins
® electronic service tool or equivalent.
https://quickserve.cummins.com/qs3/pubsys2/xml/en/tsb/2024/tsb240207.html?q=tsb240207
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11/5/24, 10:50 PM
Misfire and Engine Speed Surge at Idle
Disable the fault code.
Operate the engine within the "Conditions for Clearing the Fault Code" found in the Overview
section of the troubleshooting procedure.
Verify that the fault code is no longer active.
Check ECM Calibration Revision History.
Use the recommended Cummins® electronic service tool or equivalent to find the current
ECM code and revision number in the ECM.
Compare the ECM code and revision number in the ECM to the calibration revisions listed in
the ECM Calibration Revision History Database for applicable changes related to this fault
code.
Refer to ECM Calibration Revision History Database.
Document History
Date
2024-10-15
Details
Module Created
Last Modified: 22-Oct-2024
https://quickserve.cummins.com/qs3/pubsys2/xml/en/tsb/2024/tsb240207.html?q=tsb240207
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