2006 JEEP LIBERTY engine

▫Replacement Tires .....................266
▫ Alignment And Balance .................267

Tire Pressure Monitor System (TPMS) —
If Equipped ...........................268
▫ Base System .........................268
▫ Premium System ......................270
▫ General Information ...................274

Tire Chains ...........................274

Tire Rotation Recommendations ............275

Fuel Requirements (Gasoline Engines) ........276
▫ Reformulated Gasoline .................277
▫ Gasoline/Oxygenate Blends ..............277
▫ MMT In Gasoline .....................278 ▫
Materials Added To Fuel ................278
▫ Fuel System Cautions ..................278
▫ Carbon Monoxide Warnings ..............279

Fuel Requirements (Diesel Engines) ..........280

Fuel Tank Filler Cap (Gas Cap) .............281
▫ Loose Fuel Filler Cap Message ............282

Trailer Towing .........................282
▫ Common Towing Definitions .............283
▫ Trailer Hitch Classification ...............285
▫ Trailer Towing Weights
(Maximum Trailer Weight Ratings) .........285
▫ Trailer And Tongue Weight ..............287
▫ Towing Requirements ..................288
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STARTING PROCEDURES
Before starting your vehicle, adjust your seat, adjust both
inside and outside mirrors, and fasten your seat belts.
WARNING!
Do not leave children or animals inside parked
vehicles in hot weather. Interior heat build up may
cause serious injury or death.
Manual Transmission
Apply the parking brake, place the gearshift control lever
in N (Neutral) and depress the clutch pedal before
starting vehicle. This vehicle is equipped with a clutch
interlocking ignition system, which requires the clutch to
be fully depressed before starting the vehicle. 4WD Models Only
In 4L mode, this vehicle will start regardless of whether
or not the clutch pedal is pressed to the floor. This feature
enhances off-road performance by allowing the vehicle to
start when in 4L without having to depress the clutch
pedal. The 4 LO MODE indicator light will illuminate
when the transfer case has been shifted into this mode.
Automatic Transmission
Start the engine with the selector lever in the N (Neutral)
or P (Park) position. Apply the brake before shifting to
any driving range.
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Normal Starting — Gasoline Engines
Normal starting of either a cold or a warm engine is
obtained without pumping or depressing the accelerator
pedal. Turn the key to the START position and release
when the engine starts. If the engine fails to start within
10 seconds, turn the key to the OFF position, wait 5
seconds, then repeat the normal starting procedure.WARNING!
Never pour fuel or other flammable liquids into the
throttle body air inlet opening in an attempt to start
the vehicle. This could result in a flash fire causing
serious personal injury.
If Engine Fails to Start
If the engine fails to start after you have followed the
“Normal Starting” procedure, it may be flooded. Push
the accelerator pedal all the way to the floor and hold it
there while cranking the engine. This should clear any
excess fuel in case the engine is flooded.
Ignition Key Positions
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CAUTION!
To prevent damage to the starter, do not crank the
engine for more than 15 seconds at a time. Wait 10 to
15 seconds before trying again.
If the engine has been flooded, it may start to run, but not
have enough power to continue running when the key is
released. If this occurs, continue cranking with the accel-
erator pedal pushed all the way to the floor. Release the
accelerator pedal and the key once the engine is running
smoothly.
If the engine shows no sign of starting after two 15
second periods of cranking with the accelerator pedal
held to the floor, the “Normal Starting” procedure should
be repeated.
After Starting
The idle speed is automatically controlled and will de-
crease as the engine warms up.
Normal Starting — Diesel Engines
1. Turn the ignition key to the ON/RUN position.
2. Watch the “Glow Plug Indicator Light.” It will stay on
for a maximum of 2 seconds, depending on engine
temperature. When the “Glow Plug Indicator Light” goes
out, the engine is ready to start.
3. Do not press the accelerator. Turn the ignition key to
START and hold it in this position until the engine starts.
Starting and Operating Cautions — Diesel Engines
•
Under normal conditions, do notoperate the starter
for longer than 20 seconds at one time. At tempera-
tures below 5°F (
15°C), you may operate the starter
for up to 25 seconds at one time. Longer periods of
STARTING AND OPERATING 219
5

operation may result in starter or battery damage. If
the engine does not start at once, repeat Steps 1
through 4.
•Cold engine speeds higher than necessary for driving
or higher than specified for idling may damage engine
components.
•Before turning off your Diesel engine, always allow
the engine to return to normal idle speed and then run
for several seconds. This assures proper lubrication of
the turbocharger. This is particularly necessary after
periods of high speed driving.
•“Two-footed” driving is not recommended. Inadvert-
ently driving with the brake pedal depressed for more
than a few seconds when the accelerator pedal is held
in place can cause the ETC system to assume that a
stuck accelerator pedal has occurred. This will result in
a loss of power. Returning the brake pedal to its
normal position or moving the accelerator pedal will cancel this condition. If the depressed brake pedal and
the constant accelerator pedal position are maintained
for an extended period of time, the ETC warning light
will begin to flash and continue until the ignition
switch is cycled in the following manner. Cycle the
ignition key when the vehicle is safely and completely
stopped and the gear selector is placed in the P (Park)
position.
Turbocharger “Cool Down”
NOTE:
Letting the engine idle after extended operation
allows the turbine housing to cool to normal operating
temperature.
The following chart should be used as a guide in deter-
mining the amount of engine idle time required to
sufficiently cool down the turbocharger before shut
down, depending upon the type of driving and the
amount of cargo.
220 STARTING AND OPERATING

TURBOCHARGERCOOL DOWNCHART
Driving Conditions Load Turbocharger Temperature Idle Time (in minutes) Before Shut Down
Stop & Go Empty Cool Less than 1
Stop & Go Medium Warm 1
Highway Speeds Medium Warm 2 City Traffic Max. GCWR Warm 3
Highway Speeds Max. GCWR Warm 4 Uphill Grade Max. GCWR Hot 5
Diesel Fuel-Water Separator
A diesel fuel-water separator separates the water nor-
mally found in diesel fuel. A manual hand prime pump is
located on the filter head for re-priming the fuel system.
The fuel-water separator is located on the driver side
cowl in the engine compartment. Refer to “2.8L Turbo
Diesel Engine Compartment” in Section 7 for location. NOTE:
If the “Water-In-Fuel Warning Light” (located in
the instrument cluster) comes on, this indicates that
water has collected in the fuel filter and should be
drained immediately. See your authorized dealer for
service.
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Should your vehicle run out of fuel, the fuel system must
be re-primed in order to start the engine. Factors such as
temperature, which affects the viscosity of the fuel, how
long the vehicle has been sitting and other factors will
influence how quickly the engine starts.
Re-Priming the Diesel Fuel System
The following procedure must be followed after com-
pletely running out of fuel.
1. Add a minimum of 2 gallons (7.57L) of diesel fuel to
the fuel tank.
2. Open the hood.
3. Depress the fuel-water separator knob 20 consecutive
times. 4. Turn the ignition to START and crank the engine a
maximum of 10 seconds. If the engine does not start,
repeat Step 3.
NOTE:
The engine will typically start within 10 sec-
onds; the engine will idle then stall, purging air from the
fuel lines and filter.
Hand Prime Pump
222 STARTING AND OPERATING

5. Depress the fuel-water separator knob 20 consecutive
times.
6. Turn the ignition to START and crank the engine a
maximum of 10 seconds. The engine should start and
remain running.
NOTE: If the engine does not start, repeat the cycle as
many times as necessary.
ENGINE BLOCK HEATER — IF EQUIPPED
The engine block heater warms engine coolant and
permits quicker starts in cold weather. Connect the cord
to a standard 110-115 volt AC electrical outlet with a
grounded, three wire extension cord.
•The engine block heater cord is found under the hood
clipped to the heater line on the left side of the engine
(3.7L Engines).
•The engine block heater cord is strapped to the engine
oil dipstick tube on the left side of the engine (2.8L
Diesel Engines).
WARNING!
Remember to disconnect the cord before driving.
Damage to the 110-115 volt AC electrical cord could
cause electrocution.
Use the heater when temperatures below 0°F (-18°C) are
expected to last for several days.
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