TSB200082-040920

Service Bulletin Details

Public Details for: TSB200082-040920

This technical service bulletin describes the verification and resolution of instances of engine stumbling issues experienced by the customer while accelerating from standstill condition.The fuel pump actuator could be sticky and behave err


- 9999 -

Models from 9999
9999 CUMMINS L9 
4/29/2020
Engine Stumbles During Acceleration
Technical Service Bulletin
Technical Service Bulletin: TSB200082
Engine Stumbles During Acceleration
Released Date: 09-Apr-2020
Engine Stumbles During Acceleration
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
Engines:
ISL9 CM2350 L101
Application:
Transit Bus (For Model Year 2014-2016 Only)
Issue
Symptom:
There are instances of engine stumbling issues experienced by the customer while
accelerating from standstill condition.
Instances of Fault Code 559 with amber MIL can occur.
Root Cause:
Fuel pump actuator could be sticky and behave erratically sometimes. The fuel pump actuator
may be malfunctioning.
Verification
If this vehicle has been repaired within the last 30 days for the same symptom, then reference
published troubleshooting.
If there is a FC559 but no performance issue like stumbles during acceleration, proceed with
the published troubleshooting tree for FC559.
If engine stumbles on acceleration with or without FC559, then perform fuel pump actuator
malfunctioning steps mentioned below.
Verification Instruction:
https://quickserve.cummins.com/qs3/pubsys2/xml/en/tsb/2020/tsb200082.html
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4/29/2020
Engine Stumbles During Acceleration
Conditions
Engine running at high idle.
Connect the recommended Cummins® electronic service tool or equivalent.
Action
Use the recommended Cummins® electronic service tool or equivalent.
Monitor Commanded Fuel Rail Pressure.
Monitor Measured Fuel Rail Pressure.
Specification
Proceed to the Repair section below if the Measured Fuel Rail Pressure deviates from the
Commanded Fuel Rail Pressure by more than following: 100 bar [ 1450 psi ]
Resolution
If the commanded fuel rail pressure is not within the specification listed above, then replace
the fuel pump actuator. See ISL9 CM2350 L101 Service Manual, Bulletin 4310787. Refer to
Procedure 019-117 in Section 19. (/qs3/pubsys2/xml/en/procedures/185/185-019-117-tr.html)
Document History
Date
Details
2020-4-2
Module Created
2020-4-6
Quick Fix application:
2020-4-9
Corrected misspelling.
Last Modified: 09-Apr-2020
https://quickserve.cummins.com/qs3/pubsys2/xml/en/tsb/2020/tsb200082.html
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