2004 PORSCHE 911 GT3 check engine light

FuelQuality

Your engine isdesigned toprovide optimum performance andfueleconomy using

unleaded premiumfuelwith anoctane ratingof98 RON (93CLC orAKI).

Porsche therefore recommends theuse ofthese fuelsinyour vehicle.
Porsche alsorecognizes thatthese fuelsmaynotalways beavailable. Beassured thatyour vehicle willoperate
properly onunleaded premiumfuelswithoctane numbers ofatleast
95RON (90CLC orAKI).

since theengine's "Electronic Oktane™knockcontrol" willadapt theignition timing,ifnecessary.

Fuels containing alcoholandether

Some areasofthe U.S. require oxygenated fuelsduring certain portions ofthe year.
Oxygenated fuelsarefuels which contain alcohols (suchasmethanol orethanol) orether (such asMTBE).
Under normal conditions, theamount ofthese compounds inthe fuel willnot affect driveability.
You may useoxygenated fuelsinyour Porsche, providedtheoctane requirements foryour vehicle aremet.
We recommend, however,tochange toadifferent fuelorstation ifany ofthe following problems occurwithyour vehicle:
- Deterioration ofdriveability andperformance.
- Substantially reducedfueleconomy.
- Vapor lockandnon-start problems, especiallyathigh altitude orathigh temperature.
- Engine malfunction orstalling.

Fuels containing MMT

Some NorthAmerican fuelscontain anoctane enhancing additivecalledmethylcyclopentadienyl manganesetricarbonyl(MMT).
If such fuels areused, youremission controlsystem performance maybenegatively affected.
The check engine warning lightsonyour instrument panelmayturnon.
If this occurs, Porsche recommends youstop using fuelscontaining MMT.

4

Environmentally friendlyvehicles

Modern environmental technologyensurescom-
pliance withallemission lawsapplicable world-
wide.

These havethefollowing advantages:

- Rapid operational readinessofthe catalytic
converters ensureslowemissions, evenin
short-trip operation.
- Reliable operation andgood emission control
over along useful life.

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Please refertothe chapter "FUELECONOMY"
on page 120.
Recycling
-for aPorsche, thisisvirtually
an academic question

More thantwo-thirds ofall Porsches everbuiltare
still running.

Just incase recycling isever necessary, we
take thefollowing precautionary measures:

- Identification ofall materials.
- Use ofrecyclable materials.
- Reusable components designedforsimple
removal.
- These reasons resultinafurther increase in
the recycling ratewhich iscurrently 80per
cent.
Emission
controlisbuilt in

Innovative enginetechnology combineshighen-
gine performance andenvironmental compati-
bility.
The engine diagnosis systemelectronically moni-
tors thecomponents andsystems thataffect ex-
haust gases.
This continuous monitoringandfault storage en-
ables swift, reliable diagnosis andfault detection.
Any fault messages areindicated tothe driver by
the "Check Engine" warning lightandtheon-board
computer.

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Please refertothe chapter "WARNINGS INTHE
INSTRUMENT PANELANDINTHE ON-BOARD
COMPUTER" onpage 75.

Beforedrivingoff.. 14
Break inhints forthe first
1,000 miles/1,600 kilometers 16
Keys 19
Security WheelBolts 19
Doors 21
Central Locking 22
Alarm System, InfraredPassenger
Compartment Monitoring 24
Power Windows 26
Inside mirror 28
Rear View Mirrors 28
Rear Window Defogger,
Door Mirror Heating 29
Seat Adjustment 30
Steering WheelAdjustment.. 31
Safety Belts 32
Child Restraint Anchorages 35
Child Restraint Systems 36
Airbag Systems 38
Clutch Pedal 40
Parking Brake 40
Brakes 41
ABS Brake System
(Antilock BrakeSystem) 44
Interior lights 46
Footwell Lights 47
Operation, Instruments 48
Ignition/Starter Switchwith
anti-theft SteeringLock 50
Starting Procedures 52
Stopping Engine 53Instrument
PanelUSAModels 54
Instrument PanelCanada Models 56
Voltmeter 58
Automatic SpeedControl 58
Instrument Illumination 59
Trip Odometer 59
Speedometer 60
Changing overbetween
Miles /Kilometers 60
Tachometer 61
Turn Signal Indicator Light 61
High Beam 61
Cooling System 62
Fuel 63

C~k ~

Engine OilPressure 65
Check Engine
Warning Light 66
On-Board Computer (BC) 67
Warnings inthe Instrument Panelandinthe On-
Board Computer 75
Emergency FlasherSwitch 81
Light Switch 82
Automatic HeadlightBeamAdjustment 82
Turn Signal /
Headlight Dimmer/Flasher Lever 83
Windshield Wiper/Washer Lever 84
Automatic SpeedControl 86
Heating andVentilation 88
Automatic AirConditioning 90
Central andSide Vents 93
Fresh-air Intake 93Controls,
Instruments
Ashtray 94
Cigarette Lighter 94
Cupholder 95
Storage inthe Passenger Compartment 96
Luggage Compartment Lidand
Engine Compartment Lid 98
Luggage Compartment.. 100
Trunk Entrapment 101
Sun Visors 103
Spoiler, SideMember Panels 104
Car Audio Operation/Tips 105
Car Telephone and
Aftermarket Alarms 107
Roof Transport System 108
Gearshifting 109
Controls, Instruments

DearPorsche Owner

A lot has gone intothemanufacture ofyour
Porsche, includingadvanced engineering, rigid
quality control anddemanding inspections.
These engineering andsafety features willbe
enhanced byyou ...

the safe driver ...

- who knows hiscar and allcontrols,
- who maintains thevehicle properly,
- who uses driving skillswisely andalways
drives withinher/his owncapabilities andthe
level offamiliarity withthevehicle.
You willfind helpful hintsinthis manual onhow to
perform mostofthe checks listedonthe following
pages.
If in doubt, havethese checks performed byyour
authorized Porschedealer.
Controls, Instruments
Before
driving off...

Check thefollowing itemsfirst

I>
Turn theengine offbefore youattempt any
checks orrepairs onthe vehicle.

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Besure thetires areinflated correctly.
Check tiresfordamage andtirewear.

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See that wheel boltsareproperly tightened
and notloose ormissing.

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Check engine oillevel, addifnecessary.
Make itahabit tohave engine oilchecked with
every fuelfilling.

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Check allfluid levels suchaswindshield
washer andbrake fluidlevels.

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Besure thevehicle battery iswell charged and
cranks theengine properly.

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Check alldoors andlidsforproper operation
and latch them properly.

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Check, andifnecessary replacewornor
cracked wiperblades.

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See that allwindows areclear andunob-
structed.

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Check airintake slotsandarea between lug-
gage compartment lidand windshield arefree
of snow andice,sothe heater andthewind-
shield wipers workproperly.
I>

Ifachild willberiding inthe vehicle, check
child seat/child seatrestraint systemtoen-
sure thatrestraints areproperly adjusted.

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Check allexterior andinterior lightsforopera-
tion andthat thelenses areclean.

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Check theheadlights forproper aim,andif
necessary, havethem adjusted.

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Check underthevehicle forleaks.

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Besure allluggage isstowed securely.

Emergency equipment

It is good practice tocarry emergency equipment
in your vehicle.
Some ofthe items youshould haveare:
window scraper, snowbrush, container orbag of
sand orsalt, emergency light,small shovel, first-
aid kit, etc.

Inthe driver's seat...

c>
Check operation ofthe horn.

c>
Position seatforeasy reach offoot pedals and
controls.
To reduce thepossibility ofinjury fromthe
airbag deployment, youshould always sitback
as far from thesteering wheelasispractical,
while stillmaintaining fullvehicle control.

c>
Adjustthe insideandoutside rearview mirrors.

c>
Buckle yoursafety belts.

C>
Check operation ofthe foot andparking brake.

C>
Check allwarning andindicator lightswith
ignition onand engine notrunning.

C>
Start engine andcheck allwarning displays for
warning symbols.

C>
Never leaveanidling carunattended.

C>
Lock doors frominside, especially withchil-
dren inthe cartoprevent inadvertent opening
of doors frominside oroutside.
Drive withdoors locked.
On
the road ...

C>
Never driveafteryouhave consumed alcohol
or drugs.

C>
Always haveyoursafety beltfastened.

C>
Always drivedefensively.
Expect theunexpected.

C>
Use signals toindicate turnsandlane changes.

C>
Turn onheadlights atdusk orwhen thedriving
conditions warrantit.

C>
Always keepasafe distance fromthevehicle
in front ofyou, depending ontraffic, roadand
weather conditions.

C>
Reduce speedatnight andduring inclement
weather. Driving inwet weather requirescautionandre-
duced speeds, particularly onroads with
standing water,asthe handling characteristics
of the vehicle maybeimpaired duetohydro-
planing ofthe tires.

C>
Always observe speedlimitsandobey road
signs andtraffic laws.

C>
When tired,getwell offthe road, stopandtake
a rest. Turntheengine off.Donot sitinthe ve-
hicle withengine idling.
Please observe thechapter "ENGINE EX-
HAUST" onPage 10.
C>

When parked, alwayssetthe parking brake.
Move thegearshift levertoreverse orfirst
gear.
On hills also turnthefront wheels towardthe
curb.

C>
When emergency repairsbecome necessary,
move thevehicle welloffthe road. Turnonthe
emergency flasheranduseother warning de-
vices toalert other motorists. Donot park or
operate thevehicle inareas where thehotex-
haust system maycome incontact withdry
grass, brush,fuelspill orother flammable ma-
terial.

C>
Make itahabit tohave theengine oilchecked
with every fuelfilling.
Controls, Instruments

Break inhints forthe first
1,000 miles/l,600 kilometers
The following tipswillbehelpful inobtaining opti-
mum performance fromyournewPorsche.
Despite themost modern, high-precision manufac-
turing methods, itcannot becompletely avoided
that themoving partshavetowear inwith each
other. Thiswearing-in occursmainlyinthe first
1,000 milesj1,600 km.

Therefore:
I>
Preferably takelonger trips.

I>
Avoid frequent coldstarts withshort-distance
driving whenever possible.

I>
Avoid fullthrottle startsandabrupt stops.

I>
Donot exceed maximum enginespeedof
4,200 rpm(revolutions perminute).

I>
Donot run acold engine athigh rpmeither in
Neutral oringear.

I>
Donot letthe engine labor,especially when
driving uphill.Shifttothe next lower gearin
time (usethemost favorable rpmrange).

I>
Never lugthe engine inhigh gear atlow
speeds. Thisruleapplies atall times, notjust
during thebreak-in period.
Controls, Instruments
I>

Donot participate inmotor racing events,
sports driving schools, etc.during thefirst
1,000 milesj1,600 kilometers.
There maybeaslight stiffness inthe steering,
gear-shifting orother controls duringthebreak-in
period whichwillgradually disappear.

Break inbrake padsanddiscs

New brake padsanddiscs havetobe "broken in",
and therefore onlyattain optimal frictionwhenthe
car has covered severalhundred milesorkm.
The slightly reduced brakingabilitymustbecom-
pensated forbypressing thebrake pedalharder.
This alsoapplies whenever thebrake padsand
brake discsarereplaced.

New tires

New tires donot have maximum traction.They
tend tobe slippery.

I>
Break innew tires bydriving atmoderate
speeds duringthefirst 60to120 milesj1 00to
200 km.Longer braking distances mustbean-
ticipated.
Engine
oilconsumption

During thebreak-in periodoilconsumption maybe
higher thannormal.
As always, therate ofoil consumption dependson
the quality andviscosity ofoil, the speed atwhich
the engine isoperated, theclimate androad con-
ditions, aswell asthe amount ofdilution andoxi-
dation ofthe lubricant.

I>
Make ahabit ofchecking engineoilwith every
fuel filling, addifnecessary.

e
Closing windows

I>
Press rocker switchAuntil thewindow has
reached thedesired position.

One-touch operation

I>
Press rocker switchAbriefly.
Window movestoits final position.
Press againtostop thewindow inthe desired
position.

Comfort function whenlocking thevehicle at
the door lock

I>
Hold carkey indoor lockinthe locking direc-
tion until thewindows havereached thede-
sired position.
Anti-crushing
protection

If aside window isblocked duringclosing, itwill
stop andopen again byabout aninch.

A
Warning!
Risk ofsevere personal injuries.
If the rocker switchispressed againwithin
10 seconds ofthe window beingblocked, the
window willclose withitsfull closing force.
Anti-crushing protectionisdisabled.

I>
Once theanti-crushing protectionactstostop
the window andopens itslightly, donot press
the rocker switchagainwithin 10seconds
without checking tomake surethatnothing is
blocking thepath ofthe window.
The window willclose withfullclosing force.
One-touch operationisdisabled for10seconds
after blockage ofaside window.
Automatic
windowlowering

I>
Please observe thechapter "DOORS" onPage

21.

The standby function ofthe power
windows switches offafter twohours

When thecar isunlocked, thepower windows can
no longer beoperated aftertwohours (tosave the
car battery).

I>
Switch onthe ignition orstart theengine to
reactivate thepower windows.

Storing endposition ofthe windows

If the battery isdisconnected andreconnected,
the windows willnot beraised automatically when
the door isclosed.
1. Close thewindows withtherocker switch

once.

2. Press fronthalfofrocker switchagaintostore
the end position ofthe windows inthe control
unit.
Controls,Instruments
,27

Operation ofthe ABS system
A wheel speed sensor ismounted toeach ofthe
four wheels. Ifwheel lock-up ofeither ofthe front
wheels orthe rear wheels issensed duringbrak-
ing, thebrake pressure isadjusted automatically
until thewheel nolonger slips.Thebrake pressure
is regulated foreach frontwheel individually and
for both ofthe rear wheels together.
On aroad surface whichisslippery ononly one
side, therear wheel whichisbraking onthe slip-
pery surface determines thebrake pressure which
will beapplied equallytoboth rearwheels. Thisen-
sures thatdirectional stabilityismaintained. How-
ever, ifbraking forcesapproach thewheel lock-up
point forallwheels (panicbraking) theABS system
will intervene toprovide arapid rythmic braking.
The proper operation ofABS isperceived bythe
driver asapulsating brakepedalinconjunction
with audible noiseandperhaps somevibration.

I>
Ifyou experience thesesensations whiledriv-
ing oraroad surface withquestionable trac-
tion, reduce vehicle speedappropriate forthe
prevailing roadconditions.
The functional readinessofall the main electrical
components ofthe ABS ischecked byan
electronic monitoring systembothbefore and
while youdrive. •
Warning lightUSA
• Warning lightCanada
When theignition isswitched onthe ABS warning
light willlight upwhile thesystem iselectronically
interrogated andgoes outwhen theengine is
started ifthe check isnot yetcomplete.
If the ABS warning lampfailstogo out, thisindi-
cates thatABS hasbeen deactivated duetoa
fault. Ifthe warning lightsinthe instrument panel
and on-board computer lightupwhile youaredriv-
ing, this indicates thatafault hasoccurred. Inboth
cases, normal braking, asinvehicles withoutABS,
is still retained.
The ABS system should,however, beexamined at
an authorized Porschedealerimmediately topre-
vent theoccurrence offurther faults.

I>
Ifthe ABS system becomes inoperative, take
your vehicle toyour authorized Porschedealer
immediately.
A

Warning!
The control unitofthe ABS brake system is
set forstandard tiresize. Ifnon-standard
tires areinstalled, thecontrol unitmay mis-
interpret thespeed ofthe vehicle, because of
the variant dataitreceives fromthesensors
on the axles.

I>
Use only tiremakes andtypes tested by
Porsche.
Controls,Instruments