BASIC TROUBLESHOOTING
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
Table 31 Objectionable Exhaust Symptoms and Probable Causes
112
All information subject to change without notice.
(Rev. May 2004)
DDC-SVC-MAN-0057 0305
Copyright © 2003 DETROIT DIESEL CORPORATION