fuel pressure KIA Optima 2015 4.G Owner's Manual

489
Features of your vehicle
Low Fuel Level WarningLight
This warning light illuminates:
When the fuel tank is nearly empty.
If the fuel tank is nearly empty:
Add fuel as soon as possible.
Door Ajar Warning Light
This warning light illuminates:
When a door is not closed securely.
Trunk Open WarningLight
This warning light illuminates:
When the trunk is not closed secure-
ly.
CAUTION - Engine Oil
Pressure Warning Light
If the engine is not stopped
immediately after the EngineOil Pressure Warning Light isilluminated, severe damagecould result.
If the warning light stays on while the engine is running,there may be serious enginedamage. In this case,
1. Stop the vehicle as soon as it is safe to do so.
2. Turn off the engine and check the oil level. If the oillevel is low, fill the engineoil to the proper level.
3. Start the engine again. If the warning light stays on afterthe engine is started, turnthe engine off immediately.In this case, have your vehi-cle inspected by an author-ized Kia dealer.
CAUTION - Low Fuel
Level
Driving with the Low Fuel Levelwarning light on or with the fuellevel below can cause theengine to misfire and damagethe catalytic converter (ifequipped).

549
Driving your vehicle
Your vehicle's fuel economy depends
mainly on your style of driving, where
you drive and when you drive.
Each of these factors affects how
many miles (kilometers) you can get
from a gallon (liter) of fuel. To operate
your vehicle as economically as pos-
sible, use the following driving sug-
gestions to help save money in both
fuel and repairs:
Drive smoothly. Accelerate at amoderate rate. Don't make "jack-
rabbit" starts or full-throttle shifts
and maintain a steady cruising
speed. Don't race between stop-
lights. Try to adjust your speed to
the traffic so you don't have to
change speeds unnecessarily.
Avoid heavy traffic whenever pos-
sible. Always maintain a safe dis-
tance from other vehicles so you
can avoid unnecessary braking.
This also reduces brake wear.
Drive at a moderate speed. The faster you drive, the more fuel your
vehicle uses. Driving at a moderate
speed, especially on the highway,
is one of the most effective ways to
reduce fuel consumption. Don't "ride" the brake pedal. This
can increase fuel consumption and
also increase wear on these com-
ponents. In addition, driving with
your foot resting on the brake pedal
may cause the brakes to overheat,
which reduces their effectiveness
and may lead to more serious con-
sequences.
Take care of your tires. Keep them inflated to the recommended pres-
sure. Incorrect inflation, either too
much or too little, results in unnec-
essary tire wear. Check the tire
pressures at least once a month.
Be sure that the wheels are aligned correctly. Improper align-
ment can result from hitting curbs
or driving too fast over irregular
surfaces. Poor alignment causes
faster tire wear and may also result
in other problems as well as
greater fuel consumption. Keep your vehicle in good condi-
tion. For better fuel economy and
reduced maintenance costs, main-
tain your vehicle in accordance
with the maintenance schedule in
chapter 7. If you drive your vehicle
in severe conditions, more frequent
maintenance is required (see
chapter 7 for details).
Keep your vehicle clean. For maxi- mum service, your vehicle should
be kept clean and free of corrosive
materials. It is especially important
that mud, dirt, ice, etc. not be
allowed to accumulate on the
underside of the vehicle. This extra
weight can result in increased fuel
consumption and also contribute to
corrosion.
Travel lightly. Don't carry unneces- sary weight in your vehicle. Weight
reduces fuel economy.
Don't let the engine idle longer than necessary. If you are waiting
(and not in traffic), turn off your
engine and restart only when
you're ready to go.
ECONOMICAL OPERATION

Driving your vehicle
54
5
Driving off-road
Drive carefully off-road because your
vehicle may be damaged by rocks or
roots of trees. Become familiar with
the off-road conditions where you
are going to drive before you begin
driving.
Highway driving
Tires
Adjust the tire inflation pressures to
specification. Low tire inflation pres-
sures will result in overheating and
possible failure of the tires.
Avoid using worn or damaged tires
which may result in reduced traction
or tire failure.
Never exceed the maximum tire
inflation pressure shown on the tires.
Fuel, engine coolant and engine
oil
High speed travel consumes more
fuel than urban motoring. Do not for-
get to check both the engine coolant
and engine oil.
Drive belt
A loose or damaged drive belt may
overheat the engine.
WARNING - Tire tread
Always check the tire tread
before driving your vehicle.
Worn-out tires can result in loss
of vehicle control. Worn-out
tires should be replaced as
soon as possible. For further
information and tread limits,
refer to "Tires and wheels" in
chapter 7.
WARNING- Under/Over Inflated Tires
Always check the tires for prop-
er inflation before driving.
Underinflated or overinflated
tires can cause poor handling,
loss of vehicle control, and sud-
den tire failure leading to acci-
dents, injuries, and even death.

Maintenance
67
OWNER MAINTENANCE
The following lists are vehicle checks
and inspections that should be per-
formed by the owner or an author-
ized Kia dealer at the frequencies
indicated to help ensure safe,
dependable operation of your vehi-
cle.
Any adverse conditions should be
brought to the attention of your deal-
er as soon as possible.
These Owner Maintenance Checks
are generally not covered by war-
ranties and you may be charged for
labor, parts and lubricants used.Owner maintenance schedule
When you stop for fuel:
Check the engine oil level.
Check the coolant level in coolantreservoir.
Check the windshield washer fluid level.
Look for low or under-inflated tires.
While operating your vehicle:
Note any changes in the sound of the exhaust or any smell of
exhaust fumes in the vehicle.
Check for vibrations in the steering wheel. Notice any increased steer-
ing effort or looseness in the steer-
ing wheel, or change in its straight-
ahead position.
Notice if your vehicle constantly turns slightly or “pulls” to one side
when traveling on smooth, level
road.
When stopping, listen and check for unusual sounds, pulling to one
side, increased brake pedal travel
or “hard-to-push” brake pedal.
If any slipping or changes in the operation of your transaxle occurs,
check the transaxle fluid level.
Check the automatic transaxle P (Park) function.
Check the parking brake.
Check for fluid leaks under your vehicle (water dripping from the air
conditioning system during or after
use is normal).
WARNING - Hot coolant
Be careful when checking your
engine coolant level when the
engine is hot. Scalding hot
coolant and steam may blow
out under pressure.

747
Maintenance
TIRES AND WHEELS
Tire care
For proper maintenance, safety, and
maximum fuel economy, you must
always maintain recommended tire
inflation pressures and stay within
the load limits and weight distribution
recommended for your vehicle.
Recommended cold tire infla-
tion pressures
All tire pressures (including the
spare) should be checked when the
tires are cold. “Cold Tires” means the
vehicle has not been driven for at
least three hours or driven less than
1.6 km (one mile).
Recommended pressures must be
maintained for the best ride, top vehi-
cle handling, and minimum tire wear.
For recommended inflation pressure
refer to “Tire and wheels” in chapter
8.All specifications (sizes and pres-
sures) can be found on a label
attached to the driver’s side center
pillar.
WARNING - Tire underin-
flation
Inflate your tires consistent with
the instructions provided in this
manual. Severe underinflation (
70 kPa (10 psi) or more) can
lead to severe heat build-up,
causing blowouts, tread separa-
tion and other tire failures that
can result in the loss of vehicle
control. This risk is much higher
on hot days and when driving
for long periods at high speeds.
OMG055004

Maintenance
48
7
Underinflation also results in
excessive wear, poor handling and
reduced fuel economy. Wheel
deformation also is possible. Keep
your tire pressures at the proper
levels. If a tire frequently needs
refilling, have it checked by an
authorized Kia dealer.
Overinflation produces a harsh ride, excessive wear at the center
of the tire tread, and a greater pos-
sibility of damage from road haz-
ards.
Warm tires normally exceed rec- ommended cold tire pressures by
28 to 41 kPa (4 to 6 psi). Do not
release air from warm tires to
adjust the pressure or the tires will
be underinflated.
Be sure to reinstall the tire inflation valve caps. Without the valve cap,
dirt or moisture could get into the
valve core and cause air leakage. If
a valve cap is missing, install a
new one as soon as possible. Always observe the following:
Check tire pressure when the tires
are cold. (After vehicle has been
parked for at least three hours or
hasn't been driven more than 1.6
km (one mile) since startup.)
Check the pressure of your spare tire each time you check the pres-
sure of other tires.
Never overload your vehicle. Be careful not to overload a vehicle
luggage rack if your vehicle is
equipped with one.Checking tire inflation pres-
sure
Check your tires once a month or
more.
Also, check the tire pressure of the
spare tire.
How to check
Use a good quality gauge to check
tire pressure. You can not tell if your
tires are properly inflated simply by
looking at them. Radial tires may
look properly inflated even when
they're underinflated.
Check the tire's inflation pressure
when the tires are cold. - "Cold"
means your vehicle has been sitting
for at least three hours or driven no
more than 1.6 km (1 mile).

Maintenance
56
7
Temperature -A, B & C
The temperature grades are A (the
highest), B and C representing the
tire's resistance to the generation of
heat and its ability to dissipate heat
when tested under controlled condi-
tions on a specified indoor laboratory
test wheel.
Sustained high temperature can
cause the material of the tire to
degenerate and reduce tire life, and
excessive temperature can lead to
sudden tire failure. Grades B and A
represent higher levels of perform-
ance on the laboratory test wheel
than the minimum required by law. Tire terminology and definitions
Air Pressure: The amount of air
inside the tire pressing outward on
the tire. Air pressure is expressed in
pounds per square inch (psi) or kilo-
pascal (kPa).
Accessory Weight
: This means the
combined weight of optional acces-
sories. Some examples of optional
accessories are, automatic
transaxle, power seats, and air con-
ditioning.
Aspect Ratio : The relationship of a
tire's height to its width.
Belt: A rubber coated layer of cords
that is located between the plies and
the tread. Cords may be made from
steel or other reinforcing materials.
Bead: The tire bead contains steel
wires wrapped by steel cords that
hold the tire onto the rim.
Bias Ply Tire : A pneumatic tire in
which the plies are laid at alternate
angles less than 90 degrees to the
centerline of the tread. Cold Tire Pressure: The amount of
air pressure in a tire, measured in
pounds per square inch (psi) or kilo-
pascals (kPa) before a tire has built
up heat from driving.
Curb Weight: This means the weight
of a motor vehicle with standard and
optional equipment including the
maximum capacity of fuel, oil and
coolant, but without passengers and
cargo.
DOT Markings: The DOT code
includes the Tire Identification
Number (TIN), an alphanumeric des-
ignator which can also identify the
tire manufacturer, production plant,
brand and date of production.
GVWR: Gross Vehicle Weight Rating
GAWR FRT: Gross Axle Weight
Rating for the Front Axle.
GAWR RR: Gross Axle Weight
Rating for the Rear axle.

Index
4I
Checking the coolant level . . . . . . . . . . . . . . . . . . . . 7-31
Engine number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-10
Engine oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-\
29 Changing the engine oil and filter . . . . . . . . . . . . . . 7-30
Checking the engine oil level . . . . . . . . . . . . . . . . . . 7-29
Engine start/stop button . . . . . . . . . . . . . . . . . . . . . . . . . 5-8 Engine start/stop button position . . . . . . . . . . . . . . . . 5-8
Illuminated engine start/stop button. . . . . . . . . . . . . . 5-8
Explanation of scheduled maintenance items . . . . . . . 7-25
Exterior overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Fuel filler lid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-32 Closing the fuel filler lid . . . . . . . . . . . . . . . . . . . . . 4-32
Emergency fuel filler lid release . . . . . . . . . . . . . . . 4-34
Opening the fuel filler lid. . . . . . . . . . . . . . . . . . . . . 4-32
Fuel requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 Do not use methanol . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Fuel Additives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Gasoline containing alcohol and methanol . . . . . . . . 1-3
Gasoline containing MMT . . . . . . . . . . . . . . . . . . . . . 1-4
Operation in foreign countries . . . . . . . . . . . . . . . . . . 1-5
Use of MTBE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
. . . 7-61 Fuse/relay panel description. . . . . . . . . . . . . . . . . . . 7-66 Gross vehicle weight. . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-3
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
. . . 4-30
Closing the hood . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-30
Opening the hood . . . . . . . . . . . . . . . . . . . . . . . . . . 4-30
How to use this manual . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
If the engine overheats . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8
If the engine will not start . . . . . . . . . . . . . . . . . . . . . . . 6-4 If engine doesn’t turn over or turns over slowly . . . . 6-4
If engine turns over normally but does not start . . . . 6-4
If you have a flat tire . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-9 Changing tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-10
Jack and tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-9
Removing and storing the spare tire . . . . . . . . . . . . 6-10
Use of temporary compact spare tire . . . . . . . . . . . . 6-14
If you have a flat tire (with Tire Mobility Kit). . . . . . . 6-17 Components of the Tire Mobility Kit . . . . . . . . . . . 6-19
Distributing the sealant . . . . . . . . . . . . . . . . . . . . . . 6-21
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-17
Notes on the safe use of the Tire Mobility Kit . . . . 6-18
Producing the tire inflation pressure . . . . . . . . . . . . 6-21
F
G
H
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