BASIC TROUBLESHOOTING
BASIC TROUBLESHOOTING
This section covers basic
troubleshooting of engine operation
or performance malfunctions and
their probable causes. In addition to
operating the engine carefully and
maintaining it properly make sure to
correct any malfunction promptly.
Objectionable Exhaust Symptoms and Probable Causes
Probable Causes
Black
or Gray
Smoke
Blue
Smoke
White
Smoke
Damaged or dirty air cleaner
X
Improper grade of fuel
X
Excessive exhaust back pressure
X
Misfiring cylinders
X
Lubricating oil not burned in
cylinder (being burned in exhaust
manifold or turbocharger)
X
Faulty injector timing
X
Faulty oil control rings
X
Excessive installation angle
X
Excessive oil in crankcase
X
High ambient temperature
X
Thin air (high altitude)
X
Cetane rating of fuel too low
X
Air in the fuel system
X
112
All information subject to change without notice. (Rev. 01/04)
6SE484
0401
Copyright © 2004 DETROIT DIESEL CORPORATION