Operation and maintenance manual

QSB4.5 and QSB6.7 Troubleshooting Symptoms Charts
Section TS - Troubleshooting Symptoms Page TS-31
Engine Runs Rough or Misfires
Cause Correction
STEP 10
Moisture in the wiring harness connectors
.............
Dry the connectors with Cummins electronic
cleaner, Part Number 3824510.
OK
Go To Next Step
STEP 11
Contact a Cummins® Authorized Repair Facility