BASIC TROUBLESHOOTING
Abnormal Engine Operation Symptoms and Probable Causes
Probable Causes
Rough
Running or
Frequent
Stalling
Low Power
Detonation
Misfiring cylinder
X
X
Insufficient fuel
X
X
High return fuel temperature
X
X
Low compression
X
X
DDEC malfunction
X
X
High air inlet restriction/ex-
haust back pressure
X
Engine application
X
High air inlet temperature
X
High altitude operation
X
Incorrect engine gear train
timing
X
Low coolant temperature
X
Oil picked up by inlet airstream
X
Faulty injector operation
X
Incorrect injector height
setting
X
X
114
All information subject to change without notice. (Rev. 01/04)
6SE484
0401
Copyright © 2004 DETROIT DIESEL CORPORATION