Your vehicle was not designed to use fuel or fuel additives with metallic
compounds, including manganese-based additives.
Repairs to correct the effects of using a fuel for which your vehicle was
not designed may not be covered by your warranty.
Octane recommendations
Your vehicle is designed to use
“ Premium ” unleaded gasoline with
an (R+M)/2 octane rating of 91 or
higher for optimum performance.
The use of gasolines with lower
octane ratings may degrade performance. The use of gasolines labeled as
“ Premium ” in high altitude areas that are sold with octane ratings of less
than 91 is not recommended.
Do not be concerned if your engine sometimes knocks lightly. However, if
it knocks heavily under most driving conditions while you are using fuel
with the recommended octane rating, see your dealer or a qualified
service technician to prevent any engine damage.
Fuel quality
If you are experiencing starting, rough idle or hesitation driveability
problems during a cold start, try a different brand of gasoline. If the
problems persist, see your dealer or a qualified service technician.
It should not be necessary to add any aftermarket products to your fuel
tank if you continue to use high quality fuel of the recommended octane
rating. Aftermarket products could cause damage to the fuel system.
Repairs to correct the effects of using an aftermarket product in your
fuel may not be covered by your warranty.
Many of the world ’ s automakers approved the World-wide Fuel Charter
that recommends gasoline specifications to provide improved
performance and emission control system protection for your vehicle.
Gasolines that meet the World-wide Fuel Charter should be used when
available. Ask your fuel supplier about gasolines that meet the
World-wide Fuel Charter.
Cleaner air
Ford endorses the use of reformulated “ cleaner-burning ” gasolines to
improve air quality.
Running out of fuel
Avoid running out of fuel because this situation may have an adverse
affect on powertrain components.
91 (R+M)/2 METHOD
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For consistent results when filling the fuel tank:
• Turn the engine/ignition switch to the off position prior to refueling,
an error in the reading will result if the engine is left running.
• Use the same filling rate setting (low — medium — high) each time
the tank is filled.
• Allow no more than 2 automatic click-offs when filling.
• Always use fuel with the recommended octane rating.
• Use a known quality gasoline, preferably a national brand.
• Use the same side of the same pump and have the vehicle facing the
same direction each time you fill up.
• Have the vehicle loading and distribution the same every time.
Your results will be most accurate if your filling method is consistent.
Calculating fuel economy
1. Fill the fuel tank completely and record the initial odometer reading
(in kilometers or miles).
2. Each time you fill the tank, record the amount of fuel added (in liters
or gallons).
3. After at least three to five tank fill-ups, fill the fuel tank and record
the current odometer reading.
4. Subtract your initial odometer reading from the current odometer
reading.
5. Follow one of the simple calculations in order to determine fuel
economy:
Calculation 1: Multiply liters used by 100, then divide by total
kilometers traveled.
Calculation 2: Divide total miles traveled by total gallons used.
Keep a record for at least one month and record the type of driving (city
or highway). This will provide an accurate estimate of the vehicle ’ s fuel
economy under current driving conditions. Additionally, keeping records
during summer and winter will show how temperature impacts fuel
economy. In general, lower temperatures give lower fuel economy.
Driving style — good driving and fuel economy habits
Give consideration to the lists that follow and you may be able to change
a number of variables and improve your fuel economy.
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MERCON and MERCON V type fluids are not interchangeable.
DO NOT mix MERCON and MERCON V. Use of a transmission
fluid that indicates dual usage (MERCON and MERCON V) in
an automatic transmission application requiring MERCON may
cause transmission damage. Use of any fluid other than the
recommended fluid may cause transmission damage. 2
Add 118 ml (4 oz.) of Additive Friction Modifier XL-3 or equivalent
meeting Ford specification EST-M2C118-A for complete refill of Ford
Limited Slip rear axles.
ENGINE DATA
Engine 5.4L 4V V8 engine
Cubic inches 330
Required fuel 91 octane
Firing order 1-3-7-2-6-5-4-8
Spark plug gap 1.3-1.4 mm (0.052-0.056 inch)
Ignition system Coil on plug
Compression ratio 9.5:1
VEHICLE DIMENSIONS
Vehicle dimensions 4x2 and 4x4 mm (in)
(1) Overall length 5232.0 (206)
(2) Vehicle width
(Body) 2000.0 (78.7)
(2) Vehicle width
with power running boards,
mirrors folded 2029 (79.9)
(2) Vehicle width
with fixed running boards 2088 (82.2)
(3) Overall height 1975.0 (77.8)
(4) Wheelbase 3018.0 (118.8)
(5) Track - Front 1701.0 (67.0)
(5) Track - Rear 1704.0 (67.1)
2004 Navigator (nav)
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change oil soon warning,
message center .......................308
checking and adding ..............308
dipstick ....................................308
filter, specifications ........310, 348
recommendations ...................310
refill capacities ........................349
specifications ..................351, 354
Exhaust fumes ..........................220
Extended Rear Park Assist ......238
F
Fail safe cooling ........................317
Floor mats .................................149
Fluid capacities .........................349
Foglamps .....................................99
Four-Wheel Drive vehicles .......240
control trac .............................240
description ..............................241
driving off road .......................243
electronic shift ........................242
indicator light .........................240
preparing to drive your
vehicle .....................................227
Fuel ............................................319
calculating fuel
economy ..........................139, 323
cap ...........................................321
capacity ...................................349
choosing the right fuel ...........321
comparisons with EPA fuel
economy estimates .................326
detergent in fuel .....................322
filling your vehicle with
fuel ...........................319, 321, 323
filter, specifications ........323, 348
fuel pump shut-off switch .....263
improving fuel economy ........323
octane rating ...................322, 354 quality ......................................322
running out of fuel .................322
safety information relating to
automotive fuels .....................319
Fuses ..................................265 – 266
G
Garage Door Opener (see
Homelink wireless control
system) ......................................132
Gas cap (see Fuel cap) ............321
Gas mileage (see Fuel
economy) ...................................323
Gauges .........................................14
GAWR (Gross Axle Weight
Rating) .......................................252
calculating ...............................254
definition .................................252
driving with a heavy load ......252
location ....................................252
GVWR (Gross Vehicle Weight
Rating) .......................................252
calculating .......................252, 254
definition .................................252
driving with a heavy load ......252
location ....................................252
H
Hazard flashers .........................263
Headlamps ...................................99
aiming ......................................101
autolamp system .......................99
bulb specifications ..................103
daytime running lights ...........100
flash to pass ............................100
high beam ...............................100
replacing bulbs .......................105
turning on and off ....................99
2004 Navigator (nav)
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side view mirrors (power) .....124
Motorcraft parts ................323, 348
N
Navigation system .......................43
cd functions ..............................59
destination mode ......................71
DVD location .............................92
map mode .................................62
quick start .................................45
radio functions ..........................51
O
Octane rating ............................322
Oil (see Engine oil) ..................308
P
Panic alarm feature, remote
entry system ..............................157
Parking brake ............................223
Parts (see Motorcraft parts) ....348
Pedals (see Power adjustable
foot pedals) ...............................125
Power adjustable foot pedals ...125
Power distribution box
(see Fuses) ...............................266
Power door locks ..............153, 162
Power liftgate ............................149
Power point ...............................118
Power steering ..........................224
fluid, checking and adding ....328
fluid, refill capacity ................349
fluid, specifications .........351, 354
Power Windows .........................119 Preparing to drive your
vehicle ........................................227
R
Radio ......................................16, 21
Rear window defroster ...............98
Relays ........................................265
Remote entry system .......154, 157
illuminated entry ....................162
locking/unlocking
doors ........................153 – 155, 163
opening the trunk ...........156 – 157
panic alarm .............................157
replacement/additional
transmitters .............................161
Roadside assistance ..................262
Roof rack ...................................152
S
Safety Belt Maintenance ..........194
Safety belts (see Safety
restraints) ..................183, 186 – 190
Safety defects, reporting ..........298
Safety restraints ........183, 186 – 190
belt minder .............................191
extension assembly ................194
for adults .........................187 – 189
for children .............................203
safety belt maintenance .........194
warning light and
chime ...............................190 – 191
Safety seats for children ..........206
Seat belts
(see Safety restraints) .............183
Seats ..........................................169
child safety seats ....................206
2004 Navigator (nav)
Owners Guide (post-2002-fmt)
USA English (fus) Index
365