NORMAL OPERATION — DIESEL ENGINE
Observe the following when the engine is operating:
•
All message center lights are off.
•
Malfunction Indicator Light (MIL) is off.
•
Engine oil pressure is above 10 psi (69 kPa) at idle.
•
Voltmeter operation:
The voltmeter may show a gauge fluctuation at various
engine temperatures. This cycling operation is caused
by the post-heat cycle of the intake manifold heater
system. The number of cycles and the length of the
cycling operation is controlled by the engine control
module. Post-heat operation can run for several min-
utes, and then the electrical system and voltmeter
needle will stabilize.
The cycling action will cause temporary dimming of the
headlamps, interior lamps, and also a noticeable reduc-
tion in blower motor speed.
COLD WEATHER PRECAUTIONS
Operation in ambient temperature below 32°F (0°C)
may require special considerations. The following
charts suggest these options:
Fuel Operating Range
NOTE:
Use “Ultra Low Sulfur Diesel Fuels”
ONLY.
*No. 1 Ultra Low Sulfur Diesel Fuel should only be used
where extended arctic conditions (0°F/-18°C) exist”.
NOTE:
•
Use of Climatized Ultra Low Sulfur Diesel Fuel or
Number 1 Ultra Low Sulfur Diesel Fuel results in a
noticeable decrease in fuel economy.
•
Climatized Ultra Low Sulfur Diesel Fuel is a blend of
Number 2 Ultra Low Sulfur and Number 1 Ultra Low
Sulfur Diesel Fuels which reduces the temperature
at which wax crystals form in fuel.
•
The fuel grade should be clearly marked on the
pump at the fuel station.
•
The engine requires the use of
“Ultra Low Sulfur
Diesel Fuel”
. Use of incorrect fuel could result in
engine and exhaust system damage. Refer to “Fuel
Requirements” in “Technical Specifications” for fur-
ther information.
•
If climatized or diesel Number 1 ULSD fuel is not
available, and you are operating below (20°F/-6°C),
in sustained arctic conditions, Mopar® Premium
Diesel Fuel Treatment (or equivalent) is recom-
mended to avoid gelling (see Fuel Operating Range
Chart).
•
Under some circumstances increased engine noise
may be audible in the seconds following a cold start.
This is most likely to occur when using fuel that isn't
blended for the ambient temperature present. This
may occur on an unseasonably cold day or when a
truck is fueled in a warmer climate and driven to a
colder climate. The noise can typically be prevented
by using Mopar® Premium Diesel Fuel Treatment as
recommended (see Fuel Operating Range Chart).
Engine Oil Usage
Refer to “Dealer Service” in “Servicing And Mainte-
nance” for the correct engine oil viscosity.
Winter Front Cover Usage
A Winter front or cold weather cover is to be used in
ambient temperatures below 32°F (0°C), especially
during extended idle conditions. This cover is equipped
with four flaps for managing total grille opening in vary-
ing ambient temperatures. If a Winter front or cold
weather cover is to be used the flaps should be left in
the full open position to allow air flow to the charge air
cooler and automatic transmission oil cooler. When
ambient temperatures drop below 0°F (-17°C) the four
flaps need to be closed. A suitable cold weather cover
is available from your Mopar® dealer.
Fuel Operating Range Chart
166
STARTING AND OPERATING
