engine JEEP WRANGLER 2009 JK / 3.G Repair Manual

vehicle. The MMT content of gasoline may not be indi-
cated on the gasoline pump, therefore, you should ask
your gasoline retailer if the gasoline contains MMT.
It is even more important to look for gasoline without
MMT in Canada, because MMT can be used at levels
higher than those allowed in the United States.
MMT is prohibited in Federal and California-
reformulated gasoline.
Materials Added To Fuel
All gasoline sold in the United States is required to
contain effective detergent additives. Use of additional
detergents or other additives are not needed under
normal conditions and would result in additional cost.
Therefore you should not have to add anything to the
fuel.
Fuel System Cautions
CAUTION!
Follow these guidelines to maintain your vehicle’s
performance:
•The use of leaded gasoline is prohibited by Fed-
eral law. Using leaded gasoline can impair engine
performance, and damage the emission control
system.
•An out-of-tune engine, or certain fuel or ignition
malfunctions, can cause the catalytic converter to
overheat. If you notice a pungent burning odor or
some light smoke, your engine may be out of tune
or malfunctioning and may require immediate
service. Contact your authorized dealer for service
assistance.(Continued)5
STARTING AND OPERATING 359

CAUTION! (Continued)
•The use of fuel additives which are now being
sold as octane enhancers is not recommended.
Most of these products contain high concentra-
tions of methanol. Fuel system damage or vehicle
performance problems resulting from the use of
such fuels or additives is not the responsibility of
the manufacturer.
NOTE: Intentional tampering with emissions control
systems can result in civil penalties being assessed
against you.
Carbon Monoxide Warnings
WARNING!
Carbon monoxide (CO) in exhaust gases is deadly.
Follow the precautions below to prevent carbon
monoxide poisoning:
•Do not inhale exhaust gases. They contain carbon
monoxide, a colorless and odorless gas which can
kill. Never run the engine in a closed area, such as
a garage, and never sit in a parked vehicle with the
engine running for an extended period. If the
vehicle is stopped in an open area with the engine
running for more than a short period, adjust the
ventilation system to force fresh, outside air into
the vehicle.
(Continued)
360 STARTING AND OPERATING

CAUTION!
•Damage to the fuel system or emission control
system could result from using an improper fuel
cap (gas cap). A poorly fitting cap could let impu-
rities into the fuel system. Also, a poorly fitting
aftermarket cap can cause the “Malfunction Indi-
cator Light (MIL)” to illuminate, due to fuel vapors
escaping from the system.
•To avoid fuel spillage and overfilling, do not “top
off” the fuel tank after filling.
WARNING!
•Never have any smoking materials lit in or near
the vehicle when the gas cap is removed or the
tank is filled.(Continued)
WARNING! (Continued)
•Never add fuel when the engine is running. This is
in violation of most state and federal fire regula-
tions and will cause the MIL to turn on.
•A fire may result if gasoline is pumped into a
portable container that is inside of a vehicle. You
could be burned. Always place gas containers on
the ground while filling.
NOTE:
•When the fuel nozzle “clicks” or shuts off, the fuel
tank is full.
•Tighten the gas cap about 1/4 turn until you hear one
click. This is an indication that the cap is properly
tightened.
•If the gas cap is not tightened properly, the MIL will
come on. Be sure the gas cap is tightened every time
the vehicle is refueled.
362 STARTING AND OPERATING

Trailer Towing Weights (Maximum Trailer Weight Ratings)
The following chart provides the maximum trailer weight ratings towable for your given drivetrain.
Engine/
Transmis- sion Axle Model GCWR (Gross
Combined Wt.Rating) Frontal Area Max. GTW
(Gross TrailerWt.) Max. Trailer
Tongue Wt. (See Note)
3.8L/
Manual 3.21 Two–
Door XModel
(4WD) 5,049 lbs (2 290 kg) 25 sq ft (2.32 sq m) 1,000 lbs (453 kg) 100 lbs (45 kg)
3.8L/
Manual 3.73 Two–
Door XModel
(4WD) 6,049 lbs (2 744 kg) 25 sq ft (2.32 sq m) 2,000 lbs (907 kg) 200 lbs (91 kg)
3.8L/
Automatic 3.73 Two–
Door XModel
(4WD) 6,051 lbs (2 745 kg) 25 sq ft (2.32 sq m) 2,000 lbs (907 kg) 200 lbs (91 kg)
5
STARTING AND OPERATING 369

Engine/
Transmis- sion Axle Model GCWR (Gross
Combined Wt.Rating) Frontal Area Max. GTW
(Gross TrailerWt.) Max. Trailer
Tongue Wt. (See Note)
3.8L/
Manual 3.21 Two–
Door
Sahara Model
(4WD) 5,231 lbs (2 373 kg) 25 sq ft (2.32 sq m) 1,000 lbs (453 kg) 100 lbs (45 kg)
3.8L/
Manual 3.73 Two–
Door
Sahara Model
(4WD) 6,231 lbs (2 826 kg) 25 sq ft (2.32 sq m) 2,000 lbs (907 kg) 200 lbs (91 kg)
3.8L/
Automatic 3.73 Two–
Door
Sahara Model
(4WD) 6,233 lbs (2 827 kg) 25 sq ft (2.32 sq m) 2,000 lbs (907 kg) 200 lbs (91 kg)
370 STARTING AND OPERATING

Engine/
Transmis- sion Axle Model GCWR (Gross
Combined Wt.Rating) Frontal Area Max. GTW
(Gross TrailerWt.) Max. Trailer
Tongue Wt. (See Note)
3.8L/
Manual 4.10 2–Door
RubiconModel
(4WD) 6,365 lbs (2 887 kg) 25 sq ft (2.32 sq m) 2,000 lbs (907 kg) 200 lbs (91 kg)
3.8L/
Automatic 4.10 Two–
Door
Rubicon Model
(4WD) 6,366 lbs (2 887 kg) 25 sq ft (2.32 sq m) 2,000 lbs (907 kg) 200 lbs (91 kg)
3.8L/
Automatic 3.73 Four–
Door XModel
(2WD) 7,734 lbs (3 508 kg) 32 sq ft (2.97 sq m) 3,500 lbs
(1 587 kg)350 lbs (159 kg)
5
STARTING AND OPERATING 371

Engine/
Transmis- sion Axle Model GCWR (Gross
Combined Wt.Rating) Frontal Area Max. GTW
(Gross TrailerWt.) Max. Trailer
Tongue Wt. (See Note)
3.8L/
Automatic 3.73 Four–
Door
Sahara Model
(2WD) 7,893 lbs (3 580 kg) 32 sq ft (2.97 sq m) 3,500 lbs
(1 587 kg)350 lbs (159 kg)
3.8L/
Manual 3.21 Four–
Door XModel
(4WD) 5,431 lbs (2 463 kg) 32 sq ft (2.97 sq m) 1,000 lbs (453 kg) 100 lbs (45 kg)
3.8L/
Manual 3.73 Four–
Door XModel
(4WD) 7,931 lbs (3 597 kg) 32 sq ft (2.97 sq m) 3,500 lbs
(1 587 kg)350 lbs (159 kg)
3.8L/
Automatic 3.73 Four–
Door XModel
(4WD) 7,932 lbs (3 598 kg) 32 sq ft (2.97 sq m) 3,500 lbs
(1 587 kg)350 lbs (159 kg)
372 STARTING AND OPERATING

Engine/
Transmis- sion Axle Model GCWR (Gross
Combined Wt.Rating) Frontal Area Max. GTW
(Gross TrailerWt.) Max. Trailer
Tongue Wt. (See Note)
3.8L/
Manual 3.21 Four–
Door
Sahara Model
(4WD) 5,625 lbs (2 551 kg) 32 sq ft (2.97 sq m) 1,000 lbs (453 kg) 100 lbs (45 kg)
3.8L/
Manual 3.73 Four–
Door
Sahara Model
(4WD) 8,125 lbs (3 685 kg) 32 sq ft (2.97 sq m) 3,500 lbs
(1 587 kg)350 lbs (159 kg)
3.8L/
Automatic 3.73 Four–
Door
Sahara Model
(4WD) 8,127 lbs (3 686 kg) 32 sq ft (2.97 sq m) 3,500 lbs
(1 587 kg)350 lbs (159 kg)
5
STARTING AND OPERATING 373

Engine/
Transmis- sion Axle Model GCWR (Gross
Combined Wt.Rating) Frontal Area Max. GTW
(Gross TrailerWt.) Max. Trailer
Tongue Wt. (See Note)
3.8L/
Manual 4.10 Four–
Door
Rubicon Model
(4WD) 8,248 lbs (3 741 kg) 32 sq ft (2.97 sq m) 3,500 lbs
(1 587 kg)350 lbs (159 kg)
3.8L/
Automatic 4.10 Four–
Door
Rubicon Model
(4WD) 8,249 lbs (3 742 kg) 32 sq ft (2.97 sq m) 3,500 lbs
(1 587 kg)350 lbs (159 kg)
Refer to local laws for maximum trailer towing speeds.
NOTE: The trailer tongue weight must be considered as
part of the combined weight of occupants and cargo, and
should never exceed the weight referenced on the Tire
and Loading Information placard. Refer to the “Tire
Safety Information” section in this manual.
374 STARTING AND OPERATING

WARNING! (Continued)
•When hauling cargo or towing a trailer, do not
overload your vehicle or trailer. Overloading can
cause a loss of control, poor performance or dam-
age to the brakes, axle, engine, transmission, steer-
ing, suspension, chassis structure or tires.
•Safety chains must always be used between your
vehicle and trailer. Always connect the chains to
the frame or hook retainers of the vehicle hitch.
Cross the chains under the trailer tongue and
allow enough slack for turning corners.(Continued)
WARNING! (Continued)
•Vehicles with trailers should not be parked on a
grade. When parking, apply the parking brake on
the tow vehicle. Put the tow vehicle automatic
transmission in PARK. With a manual transmis-
sion, shift the transmission into first gear. And
with four-wheel-drive vehicles, make sure the
transfer case is not in N (Neutral). Always, block
orchock the trailer wheels.
•GCWR must not be exceeded.
•Total weight must be distributed between the tow
vehicle and the trailer such that the following four
ratings are not exceeded:
1. GVWR
2. GTW
3. GAWR
(Continued)
5
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