CUMMINS N14 - Engine Speed Surges at Low Idle

Engine Speed Surges at Low Idle
Cause Corrections
----------
• Electronic Fault Codes Active
• High Counts of Inactive Fault Codes
OK
f
Refer to N14 CELECT™ System Trouble-
shooting and Repair Manual, Bulletin No.
3810469.
----------
Fuel Level Low in the Tank
OK
f
Fill supply tank.
----------
Engine Position Sensor (EPS) Malfunctioning
- CELECT™
Engine Speed Sensor (ESS) Malfunctioning
-PTPACER
OK
f
Check EPS/ESS seating, sensor, and circuit
wires. Refer to N14 CELECT™ System
Troubleshooting and Repair Manual, Bulletin
No. 3810469.
----------
Vehicle Speed Sensor (VSS)
Malfunctioning
OK
f
Check VSS adjustment, sensor, and circuit
wires. Refer to N14 CELECT™ System
Troubleshooting and Repair Manual, Bulletin
No. 3810469.
----------
ECM Calibration Incorrect
OK
f
Compare fuel calibration data stored in ECM
with engine rating. Compulink™ required.
Refer to Compulink™ Manual, Bulletin No.
3810391.
----------
Throttle Linkage Loose, Adjusted
Incorrectly, or Worn Components*
OK
f
Adjust linkage. Refer to Procedure 5-02.
----------
Auxiliary Governor Adjusted Incorrectly*
OK
f
Adjust idle RPM above engine fuel pump
idle setting. Refer to manufacturer’s
instructions.
----------
Engine Low Idle Speed Set Incorrectly
OK
f
Adjust idle speed. On CELECT™ engines,
refer to the N14 Operation and Maintenance
Manual, Bulletin No. 3666024. On STC
engines, refer to Procedure 5-05 and the PT
Fuel Pump Rebuild and Calibration Manual,
Bulletin No. 3379084.
(Continued)
* Auxiliary Governors
SectionT-Troubleshooting Troubleshooting Symptoms Charts
N14 Page T-61