Detroit Diesel 60 Series Operator's Manual page 74

ABNORMAL ENGINE OPERATION
Probable Causes:
Misfiring cylinder
Insufficient fuel
High return fuel temperature
Low compression
DDEC malfunction
High air inlet restriction/exhaust
back pressure
Engine application
High air inlet temperature
High altitude operation
Incorrect engine gear train timing
Low coolant temperature
Oil picked up by inlet airstream
Faulty injector operation
Incorrect injector height setting
Rough Running or Frequent Stalling
Low Power
Detonation
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