2002 SUBARU IMPREZA engine

Starting and operating
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meeting Federal specifications. Gasoline sold out-
side California is permitted to have higher sulfur lev-
els, which may affect the performance of your ve-
hicle’s catalytic converter and may produce a sulfur
exhaust odor or smell. SUBARU recommends that
you try a different brand of unleaded gasoline hav-
ing lower sulfur to determine if the problem is fuel
related before returning your vehicle to an autho-rized dealer for service.
Gasoline for cleaner air
Your use of gasoline with detergent additives will
help prevent deposits from forming in your engine
and fuel system. This helps keep your engine in
tune and your emission control system working
properly, and is a way of doing your part for cleaner
air. If you continuously use a high quality fuel with
the proper detergent and other additives, youshould never need to add any fuel system cleaning agents to your fuel tank.
Many gasolines are now blended with materials
called oxygenates. Use of these fuels can also help
keep the air cleaner. Oxygenated blend fuels, such
as MTBE (Methyl Tertiary Butyl ether) or ethanol
(ethyl or grain alcohol) may be used in your vehicle,
but should contain no more than 15% MTBE or 10%
ethanol for the proper operation of your SUBARU. In addition, some gasoline suppliers are now pro-
ducing reformulated gasolines, which are designed
to reduce vehicle emissions. SUBARU approves the
use of reformulated gasoline.
If you are not sure what the fuel contains, you should
ask your service station operators if their gasolines
contain detergents and oxygenates and if they have
been reformulated to reduce vehicle emissions.
As additional guidance, only use fuels suited for
your vehicle as explained below.
Fuel should be unleaded and have an octane rat-
ing no lower than that specified in this manual. Methanol (methyl or wood alcohol) is sometimes
mixed with unleaded gasoline. Methanol can beused in your vehicle ONLY if it does not exceed 5%
of the fuel mixture AND if it is accompanied by suffi-
cient quantities of the proper cosolvents and corro-
sion inhibitors required to prevent damage to the
fuel system. Do not use fuel containing methanolEXCEPT under these conditions.
If undesirable driveability problems are experi-
enced and you suspect they may be fuel related, try
a different brand of gasoline before seeking service
at your SUBARU dealer. Fuel system damage or driveability problems
which result from the use of improper fuel are not

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2. Remove the fuel filler cap by turning it slowly
counterclockwise.
WARNING
Gasoline vapor is highly flammable. Before
refueling, always first stop the engine and
make sure that there are no lighted cigarettes,open flames or electrical sparks in the adja-cent area. When opening the cap, do not remove the
cap quickly. Fuel may be under pressure andspray out of the fuel filler neck especially in
hot weather, which may cause injury.
3. Stop filling the tank after the fuel filler pump auto-
matically stops. Do not add any more fuel.
4. Put the cap back on, turn it clockwise until you
hear a clicking noise. Be certain not to catch the
tether under the cap while tightening.
5. Close the fuel filler lid completely.
If you spill any fuel on the painted surface, rinse it
off immediately. Otherwise, the painted surface
could be damaged. NOTE If the fuel filler cap is not tightened until it clicks or if the tether is caught under the cap, the CHECK ENGINE warning light may come on. Re-fer to the
“Warning and indicator lights ” section
located in chapter 3.CAUTION
Never add any cleaning agents to the fuel
tank. The addition of a cleaning agent may
cause damage to the fuel system. Make sure that the cap is tightened until it
clicks to prevent fuel spillage in the event ofan accident. Do not let fuel spill on the exterior surfaces
of the vehicle.Fuels may cause paint damage, which is not
covered under the SUBARU Limited Warranty. Always use a genuine SUBARU fuel filler
cap. If you use the wrong cap, it may not fit orhave proper venting, and your fuel tank and
emission control system might be damaged.

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CAUTION
Resultant vehicle damage due to improper testing is not covered under the SUBARU Lim-
ited Warranty and is the responsibility of the state inspection program or its contractors orlicensees. Preparing to drive
You should perform the following checks and adjust-
ments every day before you start driving.
1. Check that all windows, mirrors, and lights are
clean and unobstructed.
2. Check the appearance and condition of the tires.
Also check tires for proper inflation.
3. Look under the vehicle for any sign of the leaks.
4. Check that the hood, trunk and rear gate are fullyclosed.
5. Check the adjustment of the seat.
6. Check the adjustment of the inside and outside
mirrors.
7. Fasten your seatbelt. Check that your passen-gers have fastened their seatbelts.
8. Check the operation of the warning and indicator
lights when the ignition switch is turned to the
“ON”
position.
9. Check the gauges, indicator and warning lights
after starting the engine. NOTE Engine oil, engine coolant, brake fluid, washer
fluid and other fluid levels should be checked
daily, weekly or at fuel stops.

Starting and operating
7-8
Starting the engine
CAUTION
Do not operate the starter motor continuously
for more than ten seconds. If the engine fails to start after operating the starter for five to ten seconds, wait for ten seconds or more be-fore trying again.
Starting the engine for a manual transmission vehicle
1. Apply the parking brake.
2. Turn off unnecessary lights and accessories.
3. Press the clutch pedal to the floor and shift the
shift lever into neutral. Hold the clutch pedal to the
floor while starting the engine.
The starter motor will only operate when the clutch
pedal is pressed fully to the floor.
4. Turn the ignition switch to the “ON” position and
check the operation of the warning and indicatorlights. Refer to the “Warning and indicator light ” sec-
tion (chapter 3).
5. Turn the ignition switch to the “START” position
without depressing the accelerator pedal. Release the key immediately after the engine has started.
If the engine does not start within ten seconds, wait
a while and then turn the ignition switch to the
“START”
position again while depressing the accel-
erator pedal half way down.
6. Confirm that all warning and indicator lights have
gone off after the engine has started. The fuel injec-
tion system automatically lowers the idle speed as
the engine warms up.
Starting the engine for an automatic transmission vehicle
1. Apply the parking brake.
2. Turn off unnecessary lights and accessories.
3. Shift the selector lever to the “P” or “N” position
(preferably “P” position).
The starter motor will only operate when the select lever is at the “P” or “N” position.
4. Turn the ignition switch to the “ON” position and
check the operation of the warning and indicator lights. Refer to the “Warning and indicator lights ”
section (chapter 3).
5. Turn the ignition switch to the “START” position
without depressing the accelerator pedal. Release
the key immediately after the engine has started.
If the engine does not start within ten seconds, wait

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a while and then turn the ignition switch to the
“START” position again while depressing the accel-
erator pedal half way down.
6. Confirm that all warning and indicator lights have
gone out after the engine has started. The fuel injec-
tion system automatically lowers the idle speed as
the engine warms up.
While the engine is warming up, make sure that the selector lever is at the “P” or “N” position and that
the parking brake is applied.
CAUTION
If you restart the engine while the vehicle is moving, shift the selector lever into the “N”
position. Do not attempt to place the selectorlever of a moving vehicle into the “P” posi-
tion.
Starting the engine during cold weather below –4°F ( –20 °C)
If the engine is difficult to start using the normal
method (without depressing the accelerator pedal),
turn the ignition switch to the “START” position while
slightly depressing the accelerator pedal.
Starting a flooded engine
If the engine does not start, it may be flooded (ex-
cessive fuel in the engine).
In case of a flooded engine, turn the starter motorfor five seconds with the accelerator pedal fully de-
pressed. Repeat this two or three times until the en-
gine starts. Release the ignition switch and acceler-
ator pedal as soon as the engine starts.

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7-10
Stopping the engine
The ignition switch should be turned off only when the engine is idling.
WARNING
Do not stop the engine when the vehicle is moving. This will cause loss of power to the
power steering and the brake booster, makingsteering and braking more difficult. It could also result in accidental activation of the
“LOCK” position on the ignition switch, caus-
ing the steering wheel to lock. Manual transmission
The manual transmission is a fully synchromeshed
5-forward and 1-reverse speed transmission.
OM-H2241
The shift pattern is shown on the shift lever knob.
When shifting from 5th gear to reverse gear, first re-
turn the shift lever to the neutral position then shift
into reverse gear.
To change gears, fully depress the clutch pedal,
move the shift lever, and gradually let up on the
clutch pedal.
If it is difficult to shift into gear, put the transmission
in neutral, release the clutch pedal momentarily, and
then try again.

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WARNING
Do not drive the vehicle with the clutch disen- gaged (i.e., when the clutch pedal is
depressed) or with the shift lever in the neu-tral position. Engine braking has no effect in either of these conditions and the risk of an
accident is consequently increased.
CAUTION
Shift into reverse ONLY when the vehicle has
completely stopped. It may cause damage to the transmission to try shifting into reversewhen the vehicle is moving.
Shifting speeds
Recommended shifting speeds
The best compromise between fuel economy and
vehicle performance during normal driving is en-
sured by shifting up at the speeds listed in the fol-lowing table. Shift up
mph (km/h)
1st to 2nd15 (24)
2nd to 3rd25 (40)
3rd to 4th40 (65)
4th to 5th45 (73)

Maximum allowable speeds
The following table shows the maximum speeds that
are possible with each different gear. Never exceed the speed limit below for each gear
position except for brief acceleration in an emergen-
cy. The tachometer ’s needle (if so equipped) will en-
ter the red area if these speeds are exceeded. Fail-
ure to observe this precaution can lead to excessive
engine wear and poor fuel economy.

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2.5 liter models (non-turbo)
mph (km/h)
RSTS, OUTBACK
1st29 (46)28 (45)
2nd48 (77)47 (75)
3rd68 (110)66 (106)
2.0 liter models (turbo)mph (km/h)
WRX
1st35 (56)
2nd61 (98)
3rd87 (140)
WARNING
When shifting down a gear, ensure that the
vehicle is not travelling at a speed exceedingthe Maximum Allowable Speed for the gearwhich is about to be selected. Failure to observe this precaution can lead to engine
over-revving and this in turn can result inengine damage.In addition, sudden application of engine
brakes when the vehicle is travelling on a slip-pery surface can lead to wheel locking; as a
consequence, control of the vehicle may be lost and the risk of an accident increased.
Driving tips
Do not drive with your foot resting on the clutch ped- al and do not use the clutch to hold your vehicle at a standstill on an upgrade. Either of those actions maycause clutch damage.
Do not drive with your hand resting on the shift lever.This may cause wear on the transmission compo-nents.
When it is necessary to reduce vehicle speed due to
slow traffic, turning corners, or driving up steep hills,
downshift to a lower gear before the engine starts to