2000 SAAB 9-3 fuel

142 Starting and drivingThe electronic control module for the auto-
matic transmission receives information on
engine torque and road speed. It also con-
trols the hydraulic pressure in the transmis-
sion to ensure that gear changing is as
smooth as possible.
The position of the selector lever is shown
by the symbols adjacent to the lever and
also by an indicator on the main instrument
panel.
The ignition key can only be removed when
the selector lever is in the P position.When the car is stationary, the engine must
be idling when the selector lever is moved.
You must have your foot on the brake
pedal to move the lever out of park. If the
accelerator is depressed while the lever is
moved, this will result in abnormal wear in
the transmission. The detent button on the selector lever has
to be pressed before the selector can be
moved between certain positions.
Three modes for the automatic transmis-
sion can be selected: Normal, Sport and
Winter.
The Normal mode, which provides the best
fuel economy, is the default setting when
the engine is started.
Sport mode alters the angle of the throttle
valve for increased power compared to the
same accelerator position in Normal mode.
This means gear changes are made to opti-
mize the car’s performance. The SPORT
indicator light is shown on the main instru-
ment panel; see page 147).
The Winter mode is intended for use when
pulling away and driving on icy roads. In this
mode, the transmission starts in 3rd gear, to
NOTEAfter selecting a drive position, pause
briefly to allow the gear to engage (the car
starts to pull a little) before you acceler-
ate.
IB1280
Indication of gear position on the main
instrument panel
IB865
Selector lever 1 Catch
2 Button for SPORT position
3 Button for WINTER position
PRND
3
2
1
IB866
Detent positions for selector movement
ProCarManuals.com

143 Starting and driving
provide better grip, and the WINTER indica-
tor appears on the main instrument panel.
When the ignition is turned to OFF, the auto-
matic transmission will automatically revert
to Normal mode (see page 147).
Adaptive gear change pattern is a func-
tion of the Normal and Sport modes. It
allows gear changing to be suited to the pre-
vailing driving conditions. The transmission
control module senses the engine load and
temperature of the transmission and selects
one of the four available gear change pat-
terns. Unnecessary gear changes and
undesired temperature increases in the
transmission are avoided.
The automatic transmission has a special
shift pattern during the first minute after a
cold engine is started so that the catalytic
converter will reach its correct working tem-
perature more rapidlyLock-up functionThe automatic transmission has a lock-up
function, which renders the torque con-
verter inoperative in 2nd, 3rd and 4th gears.
The result is reduction in the engine speed
and, hence, fuel consumption.
When the lock-up function comes into oper-
ation, it may give the impression of an over-
drive being engaged.
Shift Lock override1 Apply the parking brake.
2 Make sure the key is in the ON position.
3 Use a small tool such as a screwdriver
and push the lever downwards so that
the detent button can be pressed
approx. 10 mm.
4 Move the selector out of position P to N.
5 Remove the tool.
6 Release the parking brake if the car is to
be moved immediately; otherwise keep
it applied.Check fuse No. 1 (see page 189). If the fuse
is OK, check the battery voltage.
If the problem was cured by changing the
fuse or battery, you do not have to contact a
Saab dealer.
If the fuse blows again as soon as the Shift
Lock feature is activated you should contact
your Saab dealer.NOTEDue to electrical problems it may not be
possible to move the selector out of the
park position, even if the ignition is ON. If
for some reason the selector has to be
moved out of the park position (i.e. to tow
the car a short distance) do as described
below.
IB947
ProCarManuals.com

152 Starting and drivingParking on a hillWhen parking on a steep hill, turn the front
wheels so that they will be blocked by the
curb if the car should move.
Long-term parkingIf the car is not going to be used for some
time, e.g. 3–4 months, the following steps
are recommended:
 Run the engine to normal temperature
before long-term parking.
 Drain the washer-fluid reservoir and
hoses.  Wash and wax the car. Clean the rubber
seals on the hood, trunk lid and doors,
and lubricate them with glycerol (glyc-
erin).
 After washing the car, dry the brake discs
by taking the car out on the road and
applying the brakes a few times.
 Fill the fuel tank with fuel to prevent con-
densation forming in it.
 Top up the coolant and check the anti-
freeze before the onset of winter.
 Park the car in a dry, covered and
well-ventilated building. Leave the park-
ing brake OFF!
 Disconnect the negative (-) battery lead.
If freezing temperatures are likely to occur
during the long-term parking, remove the
battery and store it away from freezing
temperatures.
 Ideally, the car should be put up on
blocks, with the wheels off the ground. If
this is not possible, inflate the tires to
about 43 psi (300 kPa).
 Leave all the windows open a crack and
cover the car with a fabric tarpaulin - not
one made of plastic which will not breath.
IB879
1Pointing downhill and
against the curb
– Turn the wheels into the
curb and edge the car for-
ward until the wheels touch
the curb. 2Pointing uphill and
against the curb
– Turn the wheels away
from the curb and edge the
car back until the wheels
touch the curb. 3Pointing uphill or down-
hill – no curb
– Turn the wheels towards
the edge of the road. If the
car should start rolling, it
will not run into the road.
ProCarManuals.com

153 Starting and driving
Economical motoringFactors affecting fuel consumption Fuel consumption is greatly affected by the
general driving conditions, the way in which
the car is driven and at what speeds, the
weather, the state of the road, the condition
of the car, etc. Breaking-in Fuel consumption may be somewhat higher
during the break-in period (the first 3,000–
4,000 miles (5,000–7,000 km) than stated
under ”Technical data”. Weather conditionsFuel consumption can be as much as 10 %
lower in summer than in winter. The higher
consumption in cold weather is explained by
the longer time it takes for the engine to
reach normal operating temperature, and
for the transmission and wheel bearings to
warm up. Fuel economy is also affected by
the distance driven: short journeys of
3-5 miles (5-8 km) do not give the engine
enough time to reach normal temperature.
Strong winds can also affect fuel consump-
tion. How to read the graph:
If fuel consumption with the engine at
normal temperature is 28 mpg
(10l/100 km), the actual fuel consumption 3
miles (5 km) after the engine has started
from cold will be:
– 23.5 mpg (12l/100 km) at outside temp.
of 68°F (20°C) (increase of 20%)
– 17.7 mpg (16l/100 km) at outside temp.
of 32°F (0°C) (increase of 60%)
– 14 mpg (20l/100 km)) at outside temp. of
–4°F (–20°C) (increase of 100%)
As can be seen, both the distance travelled
by the car and the outside temperature have
a major impact on fuel consumption after the engine has started from cold. Thus, if the
car is mainly used for short journeys of
3–5 miles (5–8 km), the fuel consumption
will be 60–80 % higher than normal.
Driving technique To obtain the best running economy, not
only regarding fuel consumption but gen-
eral wear also, regular service is required.
 High speed, unnecessary acceleration,
heavy braking and much low gear work all
gives rise to higher fuel consumption.
 Frequent gear changing in traffic, starting
in cold weather, the use of studded tires
and roof racks, and towing a trailer all
increase fuel consumption.
 Do not run the engine when the car is sta-
tionary.
If idling, it will take much longer before the
engine becomes hot. Engine wear is
greatest during this warming-up phase.
Therefore drive away as soon as possible
after the engine is started and avoid high
revving.
IB311
Percentage increase in fuel consumption
of engine starting from cold compared to
engine at normal temperature
ProCarManuals.com

154 Starting and driving Driving in a low gear results in higher fuel
consumption than in a high gear because
of the lower engine speed for a given road
speed. Always change up to a higher gear
as soon as traffic conditions allow and use
the highest gear as much as possible.
 Check the air pressure in the tires once a
month. Incorrect pressures increase tire
wear. It is better to have slightly higher
pressure than lower.
 Check fuel consumption regularly.
Increased consumption can indicate that
something is wrong and that the car
needs to be checked by an authorized
Saab dealer.
Practical tests on the roads have demon-
strated that substantial savings in fuel con-
sumption can be made if the above advice
is heeded.Road conditions Wet roads increase fuel consumption, as do
unpaved roads and driving in hilly country
(the amount of fuel saved driving downhill is
less than the additional amount required to
climb the hill).
Engine block heater (standard
equipment in Canada, accessory in
U.S.)The following are just some of the benefits
to the car and the environment of using an
engine block heater:
 Lower fuel consumption.
 Reduced wear on the engine.
 Inside of car warms up faster.
 Exhaust emissions substantially reduced
over short runs.
The engine block heater is effective with
outside temperatures up to +60 – +70°F
(+15 – +20°C). The warmer it is outside, the
shorter the time the heater need be con-
nected. Longer than 1.5 hours is unneces-
sary.
If the car is equipped with a removable elec-
trical cabin heater that is not in use, this
should be stored in the luggage compart-
ment.
Driving in cold weatherBefore starting a journey in cold weather
you should check the following:
 That the wiper blades have not become
frozen to the windshield/glass.
 Brush any snow away from the air intake
for the heater system (opening between
hood and windshield).
 It may be advisable to lubricate the
door-lock cylinder (use molybdenum
disulphide, MoS
2) to prevent its freezing.
If the lock has frozen, take care not to
break the key (or use the remote control)
– heat it first or spray it with de-icer.
 Periodically during the winter, add gaso-
line anti-freeze to the fuel to dispel any
condensation in the fuel tank which could
freeze and cause problems in the system.
Keep the tank well filled to reduce the risk
of condensation forming.
If the car is parked outside in freezing
weather, fuel additives (gasoline
anti-freeze) will not do any good as it
cannot remove water that has already fro-
zen. Park the car in a warm place so that
any ice that may have built up melts, then
add gasoline anti-freeze when filling up
the tank. Condensation is caused by
changes in the outdoor temperature or by
the car being parked alternately in a
garage and outside.
 It is particularly important when the roads
are slippery that the brakes and tires be in
good condition.
ProCarManuals.com

157 Starting and driving
Trailer weightMaximum recommended trailer weights for
different gradients, for best comfort and
driveability for manual and automatic cars,
are shown in the drawing.
Make sure you are familiar with the law
regarding speed limits for towing, maxi-
mum trailer weights, trailer-braking
requirements, and also any special
driving-license provisions
(see also page 222).
The specified trailer weights and gradients
assume you are operating in hilly terrain and
therefore apply only to short trips.Recommendations for cars with auto-
matic transmission
The following time limits are based on the
capacity of the cooling system in warm
weather, i.e. approximately 86°F (30°C).
The following time limits are based on the
capacity of the cooling system in warm
weather, i.e. approximately 104°F (40°C).
When negotiating long hills, bear the follow-
ing important considerations in mind:
Do not drive continuously with the WINTER
mode selected in hilly country when you are
towing a trailer, as this will increase fuel con-
sumption and risk overheating the transmis-
sion.
NOTESaab 9-3 Viggen cannot be equipped
with a trailer hitch because of the design
of the body and chassis.
WARNING
When towing a trailer, do not attempt to
negotiate a hill having a gradient in
excess of 15%. The weight distribution
over the front wheels of the car will be
insufficient to prevent wheelspin, making
further progress impossible.
In addition, the parking brake may not
always be able to hold the car and trailer
securely, with the result that the wheels
can start to slide downhill.
Gradient
of hill, % Maximum
trailer
weight, lbs.
(kg)Maximum dura-
tion, minutes
10-15 1890 (850) 15 max.
Gradient
of hill, % Maximum
trailer
weight, lbs.
(kg)Maximum dura-
tion, minutes
10-15 1110 (500) 15 max.
IB1270
ProCarManuals.com

165 Starting and driving
Driving considerations
with compact spare
wheel/tire fitted The following should be observed when the
compact spare wheel (T115/70 R16) is
installed:
The compact spare is light and easy to
handle when changing the wheel. Do not
drive farther than necessary with the com-
pact spare fitted – the maximum life of the
wheel is only just over 2000 miles
(3,500 km). Have the standard wheel
repaired and reinstalled as soon as possi-
ble.
The car’s ground clearance is reduced with
the compact spare fitted. Note that only one
compact spare wheel may be used at any
time. Take care not to hit the curb and do not
fit snow chains. Leave the wheel cover off,
so that the warning text is readily visible.
For long tripsBefore starting off on a long journey, it is
advisable to have your car inspected over
by your Saab dealer.
Obtain a few important items to take along
on your journey such as spare bulbs, wiper
blades, fuses, a Poly-Vee-belt and the like.
You can check some points yourself before-
hand:
 Make sure that the engine is in good con-
dition.
 Check that no oil or fuel leaks out of the
engine or gearbox/transmission.
 Inspect the Poly-Vee-belt and replace it if
it shows any signs of wear.
 Check the battery charge.
 Check the tires for tread pattern and air
pressure, including the compact spare
wheel.
 Take an extra car key/remote control and
keep it separate, see also page 30.
 Check the brakes.
 Check all bulbs.
 Check for the presence of the tool kit and
the jack in the car.
WARNING
Do not exceed 50 mph (80 km/h) as the
tire can overheat and adversely affect the
handling of the car.
The tire should be inflated to 60 psi
(420 kPa).
NOTETo avoid damaging a punctured alloy
wheel this can be placed outside up in the
spare-wheel well but only while driving to
the closest workshop.
A general rule is that all heavy loads must
be well secured in the luggage compart-
ment, see page 129.
ProCarManuals.com

170 Car careEngine familiesSaab cars imported into the United States
and Canada meet all applicable emission
control standards. The engine family and
appropriate tune-up specifications are iden-
tified on a label affixed to the left front inner
fender.
These engine families meet applicable EPA
Federal Standards, California State Stan-
dards and Canadian Federal Standards and
are equipped with the following systems:
• Sequential multiport fuel injection system.
 Three way catalytic converter.
 Crankcase emissions control system.
 Evaporative emission system.
Emission control
systemsThe systems for controlling emissions to the
atmosphere require regular checking and
adjustment at the intervals specified in the
service program.
In addition to meeting the exhaust emission
regulations and thereby helping to keep the
environment clean, a correctly tuned engine
will also give maximum fuel economy.
Saab Trionic engine management
systemThe Saab Trionic engine management
system is a unique Saab development that
combines sequential multiport fuel injection,
electronic distributorless ignition and turbo-
charger boost pressure control into one sys-
tem.
The Trionic engine control module (ECM)
monitors many different engine parameters
such as:
 Intake manifold pressure.
 Intake air temperature.
 Crankshaft position.
 Engine coolant temperature.
 Throttle position.
 The oxygen content of the exhaust gases.
The ECM receives information regarding
engine knocking from a sophisticated feed-
back function in the ignition discharge unit.
By processing all of this information, the Tri-
onic system can control fuel injector open-
ing duration, ignition timing and turbo-
charger boost pressure to provide excellent
engine performance while maintaining low
emissions and fuel consumption.
ProCarManuals.com