Cluster Mercury Grand Marquis 2004 s Owner's Guide

•Your“Check Engine”indicator may come on. For more information on
the“Check Engine”indicator, refer to theInstrument Cluster
chapter.
Fuel Filter
For fuel filter replacement, see your dealer or a qualified service
technician. Refer to the scheduled maintenance guide for the appropriate
intervals for changing the fuel filter.
Replace the fuel filter with an authorized Motorcraft part. The
customer warranty may be void for any damage to the fuel system
if an authorized Motorcraft fuel filter is not used.
ESSENTIALS OF GOOD FUEL ECONOMY
Measuring techniques
Your best source of information about actual fuel economy is you, the
driver. You must gather information as accurately and consistently as
possible. Fuel expense, frequency of fill-ups or fuel gauge readings are
NOT accurate as a measure of fuel economy. We do not recommend
taking fuel economy measurements during the first 1,600 km (1,000 miles)
of driving (engine break-in period). You will get a more accurate
measurement after 3,000 km–5,000 km (2,000 miles-3,000 miles).
Filling the tank
The advertised fuel capacity of the fuel tank on your vehicle is equal to
the rated refill capacity of the fuel tank as listed in theRefill capacities
section of this chapter.
The advertised capacity is the amount of the indicated capacity and the
empty reserve combined. Indicated capacity is the difference in the
amount of fuel in a full tank and a tank when the fuel gauge indicates
empty. Empty reserve is the small amount of fuel remaining in the fuel
tank after the fuel gauge indicates empty.
The amount of usable fuel in the empty reserve varies and should
not be relied upon to increase driving range. When refueling your
vehicle after the fuel gauge indicates empty, you might not be
able to refuel the full amount of the advertised capacity of the
fuel tank due to the empty reserve still present in the tank.
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.
2004 Grand Marquis(grn)
Owners Guide (post-2002-fmt)
USA English(fus)
Maintenance and Specifications
201

present, theCheck engine/Service engine soonlight should turn off. (A
driving cycle consists of a cold engine startup followed by mixed
city/highway driving.) No additional vehicle service is required.
If theCheck engine/Service engine soonlight remains on, have your
vehicle serviced at the first available opportunity.
Readiness for Inspection/Maintenance (I/M) testing
In some localities, it may be a legal requirement to pass an I/M test of
the on-board diagnostics system. If yourCheck engine/Service engine
soonlight is on, refer to the description in theWarning lights and
chimessection of theInstrument Clusterchapter. Your vehicle may not
pass the I/M test with theCheck engine/Service engine soonlight on.
If the vehicle’s powertrain system or its battery has just been serviced,
the on-board diagnostics system is reset to a“not ready for I/M test”
condition. To ready the on-board diagnostics system for I/M testing, a
minimum of 30 minutes of city and highway driving is necessary as
described below:
•First, at least 10 minutes of driving on an expressway or highway.
•Next, at least 20 minutes driving in stop-and-go, city-type traffic with
at least four idle periods.
Allow the vehicle to sit for at least eight hours without starting the
engine. Then, start the engine and complete the above driving cycle. The
engine must warm up to its normal operating temperature. Once started,
do not turn off the engine until the above driving cycle is complete.
CHECKING AND ADDING POWER STEERING FLUID
Check the power steering fluid.
Refer to the scheduled maintenance
guide for the service interval
schedules.If adding fluid is
necessary, use only MERCON
AT F.
1. Start the engine and let it run until it reaches normal operating
temperature (the engine coolant temperature gauge indicator will be
near the center of the normal area between H and C).
2004 Grand Marquis(grn)
Owners Guide (post-2002-fmt)
USA English(fus)
Maintenance and Specifications
206

recommendations ...................187
refill capacities ........................225
specifications ..................226, 228
Exhaust fumes ..........................127
F
Fail safe cooling ........................195
Floor mats ...................................71
Fluid capacities .........................225
Fuel ............................................196
calculating fuel
economy ............................52, 201
cap ...........................................198
capacity ...................................225
choosing the right fuel ...........199
comparisons with EPA fuel
economy estimates .................204
detergent in fuel .....................200
filling your vehicle
with fuel ..................196, 198, 201
filter, specifications ........201, 224
fuel pump shut-off switch .....145
improving fuel economy ........201
octane rating ...................200, 228
quality ......................................200
running out of fuel .................200
safety information relating to
automotive fuels .....................196
Fuses ..................................146–147
G
Garage Door Opener
(see Homelink wireless control
system) ........................................63
Gas cap (see Fuel cap) ............198
Gas mileage
(see Fuel economy) .................201
Gauges .........................................15H
Hazard flashers .........................145
Head restraints ...........................86
Headlamps ...................................36
aiming ........................................38
autolamp system .......................36
bulb specifications ....................40
daytime running lights .............36
flash to pass ..............................37
high beam .................................37
replacing bulbs .........................41
turning on and off ....................36
Heating
heating and air conditioning
system .................................32–33
HomeLink universal
transceiver (see
Garage door opener) ............53, 66
Homelink wireless control
system ..........................................63
Hood ..........................................182
I
Ignition ...............................123, 228
Infant seats
(see Safety seats) .....................114
Inspection/maintenance
(I/M) testing ..............................206
Instrument panel
cleaning ...................................178
cluster ........................................10
lighting up panel
and interior ...............................37
J
Jack ............................................153
Index
237