
RENR5622 53
Troubleshooting Section
Valve Adjustment
Check the valve adjustment. Refer to the Systems
Operation/Testing and Adjusting manual for more
information.
i02421039
Excessive W h i
te Smoke
SMCS Code: 1000-038; 1901-038
Note: Some white smoke may be present during
cold start-up conditions when the engine is operating
normally. If t
he white smoke persists, there may be
a problem.
Probable Causes
•
Starting aid
s (if applicable)
•
Coolant temperature sensor
•
Water temperature regulators
•
Engine speed
/timing sensor
•
Unit injectors
•
Flash file
•
Fuel supply
•
Component wear
•
Cooling system
Recommended Actions
Starting Aid
s (if applicable)
1. If equipped, check for proper operation of installed
starting aid
s.
a. Ensure that the ether canister is not empty
and/or low.
Replace the ether canister if the
ether canister is empty and/or low.
b. Actuate the
system manually after start-up
and observe results. The ether system will
not operate if the coolant temperature is too
high. Refe
r to the diagnostic functional test
Troubleshooting, “Ether Injection System”.
Coolant Te
mperature Sensor
1. Use the Caterpillar Electronic Technician (ET) to
verify tha
t the engine has exited cold mode.
2. Compare the coolant temperature from Cat ET to
the coolant tem
perature that is obtained from the
6V-9130 Temperature Adapter (MULTIMETER).
Water Tempera
ture Regulators
Check the water temperature regulators for correct
operation. Ve
rify that the engine reaches full
operating temperature. If the engine does not reach
full operating temperature, a water temperature
regulator ma
y be stuck open. Remove the water
temperature regulator and inspect the water
temperature regulator. If necessary, repair the
water temper
ature regulator and/or replace the
coolant temperature regulator. Refer to the Systems
Operation/Testing and Adjusting manual for the
proper proc
edure.
Engine Speed/Timing
Check the calibration of the engine speed/timing
sensor. Refer to Troubleshooting, “Engine
Speed/Tim
ing Sensor - Calibrate”.
Unit Injectors
Perform the “Cylinder Cutout Test” on Cat ET in order
to try to isolate any injectors that might be misfiring.
Refer to Tr
oubleshooting, “Injector Solenoids”.
Flash File
Verifythatthecorrectflashfileisinstalled.
Fuel Sup pl
y
1. Inspect the fuel system components.
2. Check the fuel pressure during engine cranking.
Check the filtered fuel pressure. Refer to the
Systems O
peration/Testing and Adjusting manual
for the correct pressure values. If the fuel pressure
is low, replace the fuel filters. If the fuel pressure
is still l
ow, check the following items: fuel transfer
pump, fuel transfer pump coupling, and fuel
pressure regulating valve.
3. Check the fuel quality. Low cetane fuel can create
white smoke. If necessary, replace the fuel with a
higher c
etane fuel.
4. Cold weather adversely affects the characteristics
of the fu
el. Refer to the Operation and
Maintenance Manual for information on improving
the characteristics of the fuel during cold weather
operat
ion.