NHTSA ID Number: 10131030
Manufacturer Communication Number: IK1200376
TSB/Document Date: 2018-04-02
Summary
Stumble or misfire on acceleration and setting cam codes on I6 engines
IK1200376 Stumble or misfire on acceleration and setting cam codes on I6 engines from... Page 1 of 3
Countries:
AUSTRALIA, BRAZIL, CANADA, Document
UNITED STATES, PUERTO
IK1200376
ID:
RICO, SOUTH AFRICA
Availability:
Major
System:
Current
Language:
Other
Languages:
ISIS, Bus ISIS, FleetISIS
Revision:
2
ENGINES
Created:
5/20/2009
English
Last
Modified:
2/11/2014
Français, Español,
Author:
Randy
Geweniger
Viewed:
7406
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Title : Stumble or misfire on acceleration and setting cam codes on I6 engines from
1995 to present.*
Applies To : DT466 DT530 DT570
DESCRIPTION
Stumble or misfire on acceleration and setting cam codes on I6 engines from 1995 to present.*
POSSIBLE DIAGNOSTIC TROUBLE CODES
DTC MODULE DESCRIPTION
143
144
Wrong number of CMP signal transitions per cam revolution
CMP signal noise detected
1143 ECM
CMP signal incorrect for CKP sync
1144 ECM
CKP signal noise detected
PROCEDURES
1. These cam codes can be set due to camshaft end play out of spec and may not even set a code at all
but the truck is experiencing a surge, stumble, or misfire under a load during acceleration.
2. The camshaft end play will need to be checked, to do this you will need tool ZTSE4414 on pre EGR
engines.
https://evalue.internationaldelivers.com/service_kb/DocTool/ArticleViewer.aspx?ControlID... 3/5/2014
IK1200376 Stumble or misfire on acceleration and setting cam codes on I6 engines from... Page 2 of 3
3.
Remove the cam sensor and install the camshaft end play tool. Once the tool is installed
rotate clockwise by hand 14 times and stop to zero out the tool. Next rotate the engine by hand 14 times
counter clockwise and record the reading. The end play should be 0.005-0.013in, if it is higher than this
the cam gear has walked off the camshaft.
4. This tool can also be used to measure camshaft run out as well. Install the tool and crank the engine and
watch the fluctuation. Subtract the min and max number from each other and compare that reading to
the spec of 0.008in or less.
5. On EGR and Maxxforce engines use this same method but a depth gauge will have to be used it
measure the camshaft end play, no more the 0.013in.
RESOLUTION
The front cover will have to be removed and the cam gear will have to be replaced.
*Note: if a truck has repeat injector tip failures on pre EGR engines, follow this procedure and check the camshaft end play.
OTHER RESOURCES
https://evalue.internationaldelivers.com/service_kb/DocTool/ArticleViewer.aspx?ControlID... 3/5/2014
IK1200376 Stumble or misfire on acceleration and setting cam codes on I6 engines from... Page 3 of 3
•
•
•
•
Use the engine Service Manual for the proper procedure on the installation of the cam gear.
https://evalue.internationaldelivers.com/service/engine/eges2101.htm Pre EGR DT
https://evalue.internationaldelivers.com/service/engine/eges2652.htm EGR DT
https://evalue.internationaldelivers.com/service/engine/eges3351.htm MaxxForce DT
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Copyright © 2014 Navistar
, Inc.
https://evalue.internationaldelivers.com/service_kb/DocTool/ArticleViewer.aspx?ControlID... 3/5/2014
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TSB/Document ID: IK1200376
Replacement Service Bulletin Number:
MFR Communication Date: 2014-02-11
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: POWER TRAIN:AUTOMATIC TRANSMISSION
MFR Component System:
MFR Component Subsystem:
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