2007 JEEP WRANGLER Engine

Under-inflation also reduces fuel efficiency and tire
tread life, and may affect the vehicle’s handling and
stopping ability.
•The TPMS is not a substitute for proper tire mainte-
nance, and it is the driver ’s responsibility to maintain
correct tire pressure, even if under-inflation has not
reached the level to trigger illumination of the “Tire
Pressure Monitoring Telltale Light.”
General Information
This device complies with part 15 of the FCC rules and
RSS 210 of Industry Canada. Operation is subject to the
following conditions:
•This device may not cause harmful interference.
•This device must accept any interference received,
including interference that may cause undesired op-
eration.The tire pressure sensors are covered under one of the
following licenses:
United States.....................KR5S120123
Canada........................2671-S120123
FUEL REQUIREMENTS
Your engine is designed to meet all emis-
sions regulations and provide excellent
fuel economy and performance when us-
ing high quality unleaded gasoline having
an octane rating of 87. The use of premium
gasoline is not recommended. The use of
premium gasoline will provide no benefit over high
quality regular gasoline, and in some circumstances may
result in poorer performance.
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5

Light spark knock at low engine speeds is not harmful to
your engine. However, continued heavy spark knock at
high speeds can cause damage and immediate service is
required.
Poor quality gasoline can cause problems such as hard
starting, stalling and hesitations. If you experience these
symptoms, try another brand of gasoline before consid-
ering service for the vehicle.
Over 40 auto manufacturer’s world wide have issued and
endorsed consistent gasoline specifications (the World-
wide Fuel Charter, WWFC) to define fuel properties
necessary to deliver enhanced emissions, performance,
and durability for your vehicle. The manufacturer recom-
mends the use of gasoline that meets the WWFC speci-
fications if they are available.Reformulated Gasoline
Many areas of the country require the use of cleaner
burning gasoline referred to as “Reformulated Gasoline.”
Reformulated gasolines contains oxygenates, and are
specifically blended to reduce vehicle emissions and
improve air quality.
The manufacturer strongly supports the use of reformu-
lated gasolines. Properly blended reformulated gasolines
will provide excellent performance and durability for the
engine and fuel system components.
Gasoline/Oxygenate Blends
Some fuel suppliers blend unleaded gasoline with oxy-
genates such as 10% ethanol, MTBE, and ETBE. Oxygen-
ates are required in some areas of the country during the
winter months to reduce carbon monoxide emissions.
Fuels blended with these oxygenates may be used in
your vehicle.
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Fuel System Cautions
CAUTION!
Follow these guidelines to maintain your vehicle’s
performance:
•The use of leaded gasoline is prohibited by Federal
law. Using leaded gasoline can impair engine perfor-
mance, 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 dealer for service assistance.
•The use of fuel additives which are now being sold as
octane enhancers is not recommended. Most of theseproducts contain high concentrations 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
324 STARTING AND OPERATING

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.
•Guard against carbon monoxide with proper mainte-
nance. Have the exhaust system inspected every time
the vehicle is raised. Have any abnormal conditions
repaired promptly. Until repaired, drive with all side
windows fully open.
•Keep the swing gate closed when driving your vehicle
to prevent carbon monoxide and other poisonous
exhaust gases from entering the vehicle.
ADDING FUEL
Fuel Filler Cap (Gas Cap)
The gas cap is located on the driver’s side of the vehicle.
If the gas cap is lost or damaged, be sure the replacement
cap is for use with this vehicle.
Fuel Filler Cap
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CAUTION!
Damage to the fuel system or emission control sys-
tem could result from using an improper fuel cap
(gas cap). A poorly fitting cap could let impurities
into the fuel system. Also, a poorly fitting after-
market cap can cause the MIL (Malfunction Indicator
Light) to illuminate, due to fuel vapors escaping from
the system.
CAUTION!
A poorly fitting gas cap may cause the Malfunction
Indicator Light to turn on.
CAUTION!
To avoid fuel spillage and overfilling, do not “top
off” the fuel tank after filling.
NOTE:When the fuel nozzle “clicks” or shuts off, the
fuel tank is full.
WARNING!
•Never have any smoking materials lit in or near
the vehicle when the gas cap is removed or the
tank filled.
•Never add fuel when the engine is running. This is
in violation of most state and federal fire regula-
tions and will cause the malfunction indicator
light to turn on.
326 STARTING AND OPERATING

NOTE:Tighten the gas cap about 1/4 turn until you
hear one click. This is an indication that cap is properly
tightened.
If the gas cap is not tighten properly, the Malfunction
Indicator Light will come on. Be sure the gas cap is
tightened every time the vehicle is refueled.
WARNING!
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.
CAUTION!
Damage to the fuel system or emission control sys-
tem could result from using an improper fuel tank
filler cap (gas cap). A poorly fitting cap could let
impurities into the fuel system.
WARNING!
•Never add fuel when the engine is running.
•Never have any smoking materials lit in or near
the vehicle when the fuel cap is removed or the
tank filled.
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5

Trailer Towing Weights (Maximum Trailer Weight Ratings)
The following chart provides the maximum trailer weight ratings towable for your given drivetrain.
Engine/
Transmis-
sionAxle Model GCWR (Gross
Combined Wt.
Rating)Frontal Area Max. GTW (Gross
Trailer Wt.)Max. Tongue Wt.
(See Note 1)
3.8L/
Manual3.21 2 Door X Model
(4WD)4,932 lbs (2 237 kg) 25 sq. ft. (2.32
square meters)1,000 lbs (453 kg) 100 lbs (45 kg)
3.8L/
Manual4.10 2 Door X Model
(4WD)5,932 lbs (2 691 kg) 25 sq. ft. (2.32
square meters)2,000 lbs (907 kg) 200 lbs (91 kg)
3.8L/
Automatic4.10 2 Door X Model
(4WD)5,955 lbs (2 701 kg) 25 sq. ft. (2.32
square meters)2,000 lbs (907 kg) 200 lbs (91 kg)
3.8L/
Manual3.21 2 Door Sahara
Model (4WD)5,102 lbs (2 314 kg) 25 sq. ft. (2.32
square meters)1,000 lbs (453 kg) 100 lbs (45 kg)
3.8L/
Manual4.10 2 Door Sahara
Model (4WD)6,102 lbs (2 768 kg) 25 sq. ft. (2.32
square meters)2,000 lbs (907 kg) 200 lbs (91 kg)
3.8L/
Automatic4.10 2 Door Sahara
Model (4WD)6,126 lbs (2 779 kg) 25 sq. ft. (2.32
square meters)2,000 lbs (907 kg) 200 lbs (91 kg)
3.8L/
Manual4.10 2 Door Rubicon
Model (4WD)6,219 lbs (2 821 kg) 25 sq. ft. (2.32
square meters)2,000 lbs (907 kg) 200 lbs (91 kg)
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Engine/
Transmis-
sionAxle Model GCWR (Gross
Combined Wt.
Rating)Frontal Area Max. GTW (Gross
Trailer Wt.)Max. Tongue Wt.
(See Note 1)
3.8L/
Automatic4.10 2 Door Rubicon
Model (4WD)6,243 lbs (2 832 kg) 25 sq. ft. (2.32
square meters)2,000 lbs (907 kg) 200 lbs (91 kg)
3.8L/
Manual3.21 4 Door X Model
(2WD)5,126 lbs (2 325 kg) 32 sq. ft. (2.97
square meters)1,000 lbs (453 kg) 100 lbs (45 kg)
3.8L/
Manual4.10 4 Door X Model
(2WD)7,626 lbs (3 459 kg) 32 sq. ft. (2.97
square meters)3,500 lbs (1 587 kg) 350 lbs (159 kg)
3.8L/
Automatic4.10 4 Door X Model
(2WD)7,649 lbs (3 469 kg) 32 sq. ft. (2.97
square meters)3,500 lbs (1 587 kg) 350 lbs (159 kg)
3.8L/
Manual3.21 4 Door Sahara
Model (2WD)5,289 lbs (2 399 kg) 32 sq. ft. (2.97
square meters)1,000 lbs (453 kg) 100 lbs (45 kg)
3.8L/
Manual4.10 4 Door Sahara
Model (2WD)7,789 lbs (3 533 kg) 32 sq. ft. (2.97
square meters)3,500 lbs (1 587 kg) 350 lbs (159 kg)
3.8L/
Automatic4.10 4 Door Sahara
Model (2WD)7,812 lbs (3 543 kg) 32 sq. ft. (2.97
square meters)3,500 lbs (1 587 kg) 350 lbs (159 kg)
3.8L/
Manual3.21 4 Door X Model
(4WD)5,330 lbs (2 418 kg) 32 sq. ft. (2.97
square meters)1,000 lbs (453 kg) 100 lbs (45 kg)
336 STARTING AND OPERATING