1999 Mercury Grand Marquis engine

economy. Additionally, keeping records during summer and winter will
show how temperature impacts fuel economy. In general, lower
temperatures give lower fuel economy.
Driving style Ð 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.
Habits
²Smooth, moderate operation can yield up to 10% savings in fuel.
²Steady speeds without stopping will usually give the best fuel
economy.
²Idling for long periods of time (greater than one minute) may waste
fuel.
²Anticipate stopping; slowing down may eliminate the need to stop.
²Sudden or hard accelerations may reduce fuel economy.
²Slow down gradually.
²Drive at reasonable speeds (traveling at 105 km /h [65 mph] uses 15%
more fuel than traveling at 88 km/h [55 mph]).
²Revving the engine before turning it off may reduce fuel economy.
²Use of the air conditioner or defroster may reduce fuel economy.
²Use of speed control (if equipped) may improve fuel economy. Speed
control can help maintain a constant speed and reduce speed changes.
You may want to turn off the speed control in hilly terrain as
unnecessary shifting between third and fourth gears may occur and
could result in reduced fuel economy.
²Warming up a vehicle on cold mornings is not required and may
reduce fuel economy.
²Resting your foot on the brake pedal while driving may reduce fuel
economy.
²Combine errands and minimize stop-and-go driving.
Maintenance
²Keep tires properly inflated and use only recommended size.
²Operating a vehicle with the wheels out of alignment will reduce fuel
economy.
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163

²Use recommended engine oil. Refer toLubricant Specifications.
²Perform all regularly scheduled maintenance items. Follow the
recommended maintenance schedule and owner maintenance checks
found in your vehicle Scheduled Maintenance Guide.
Conditions
²Heavily loading a vehicle or towing a trailer may reduce fuel economy
at any speed.
²Carrying unnecessary weight may reduce fuel economy (approximately
2 km/h [1 mpg] is lost for every 180 kg [400 lb] of weight carried).
²Adding certain accessories to your vehicle (for example bug
deflectors, rollover/light bars, running boards, ski/luggage racks) may
reduce fuel economy.
²Use of fuel blended with alcohol may lower fuel economy.
²Fuel economy may decrease with lower temperatures during the first
12±16 km (8±10 miles) of driving.
²Driving on flat terrain offers improved fuel economy as compared to
driving over hilly terrain.
²Transmissions give their best fuel economy when operated in the top
cruise gear and with steady pressure on the gas pedal.
²Close windows for high speed driving.
EPA window sticker
Every new vehicle should have the EPA window sticker. Contact your
dealer if the window sticker is not supplied with your vehicle. The EPA
window sticker should be your guide for the fuel economy comparisons
with other vehicles.
It is important to note the box in the lower left corner of the window
sticker. These numbers represent the Range of Km/L (MPG) expected on
the vehicle, depending upon the driver's method of operation and
conditions.
EMISSION CONTROL SYSTEM
Your vehicle is equipped with various emission control components and a
catalytic converter which will enable your vehicle to comply with
applicable exhaust emission standards. To make sure that the catalytic
converter and other emission control components continue to work
properly:
Maintenance and care
164

²Use only unleaded fuel.
²Avoid running out of fuel.
²Do not turn off the ignition while your vehicle is moving, especially at
high speeds.
²Have the items listed in your Scheduled Maintenance Guide performed
according to the specified schedule.
The scheduled maintenance items listed in the Scheduled Maintenance
Guide are essential to the life and performance of your vehicle and to its
emissions system.
If other than Ford, Motorcraft or Ford-authorized parts are used for
maintenance replacements or for service of components affecting
emission control, such non-Ford parts should be equivalent to genuine
Ford Motor Company parts in performance and durability.
Do not park, idle, or drive your vehicle in dry grass or other dry
ground cover. The emission system heats up the engine
compartment and exhaust system, which can start a fire.
Illumination of the charging system warning light,Check Engine
indicator light or the temperature warning light, fluid leaks, strange
odors, smoke or loss of oil pressure, could indicate that the emission
control system is not working properly.
Exhaust leaks may result in entry of harmful and potentially
lethal fumes into the passenger compartment.
Do not make any unauthorized changes to your vehicle or engine. By
law, vehicle owners and anyone who manufactures, repairs, services,
sells, leases, trades vehicles, or supervises a fleet of vehicles are not
permitted to intentionally remove an emission control device or prevent
it from working. Information about your vehicle's emission system is on
the Vehicle Emission Control Information Decal located on or near the
engine. This decal identifies engine displacement and gives some tune up
specifications.
Please consult your ªWarranty Guideº for complete emission warranty
information.
Maintenance and care
165

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 your ªCheck Engine/Service Engine
Soonº light is on, refer to the description in theWarning Lights and
Chimessection of theInstrumentationchapter. Your vehicle may not
pass the I/M test with the ªCheck Engine/Service Engine Soonº light on.
If the vehicle's powertrain system or its battery has just been serviced,
the on-board diagnostics system is reset to a ªnot ready for I/M testº
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:
²First, at least 10 minutes of driving on an expressway or highway.
²Next, 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.
EXTERIOR BULBS
Replacing exterior bulbs
Check the operation of the following lamps frequently:
²Headlamps
²Tail lamps
²Brakelamps
²High-mount brakelamp
²Turn signals
²Backup lamps
²License plate lamp
Do not remove lamp bulbs unless they will be replaced immediately. If a
bulb is removed for an extended period of time, contaminants may enter
the lamp housings and affect performance.
Maintenance and care
166

Cleaning the wheels
Wash with the same detergent as the body of your vehicle. Do not use
acid-based or alcohol-based wheel cleaners, steel wool, fuel or strong
detergents. Never use abrasives that will damage the finish of special
wheel surfaces. Use a tar remover to remove grease and tar.
The brushes used in some automatic car washes may damage the finish
on your wheels. Before going to a car wash, find out if the brushes are
abrasive.
Cleaning the engine
Engines are more efficient when they are clean because grease and dirt
buildup keep the engine warmer than normal. When washing:
²Take care when using a power washer to clean the engine. The high
pressure fluid could penetrate the sealed parts and cause damage.
²Do not spray with cold water to avoid cracking the engine block or
other engine components.
²Never apply anything to the drive belt (including belt dressing).
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172

²Cover the highlighted areas to prevent water damage when cleaning
the engine.
²Never wash or rinse the engine while it is running; water in the
running engine may cause internal damage.
Cleaning plastic exterior parts
Use vinyl cleaner for routine cleaning. Clean with a tar remover if
necessary. Do not clean plastic parts with thinners, solvents or
petroleum-based cleaners.
Cleaning the exterior lamps
Wash with the same detergent as the exterior of your vehicle. Use glass
cleaner or tar remover if necessary.
To avoid scratching the lamps, do not use a dry paper towel, chemical
solvents or abrasive cleaners.
Cleaning the wiper blades and windshield
If the wiper blades do not wipe properly, clean the wiper blade rubber
element with undiluted windshield washer solution or a mild detergent.
To avoid damaging the blades, do not use fuel, kerosene, paint thinner or
other solvents.
If the wiper still does not wipe properly, this could be caused by
substances on the windshield such as tree sap and some hot wax
treatments used by commercial car washes. Clean the outside of the
windshield with a non-abrasive cleanser such as the non-abrasive
Bon-Amitpowder. Rinse thoroughly with clean water.Do notuse
abrasive cleansers on glass as they may cause scratches. The windshield
is clean if beads do not form when you rinse it with water. The
windshield and wiper blades should be cleaned on a regular basis, and
blades or rubber elements replaced when worn.
Cleaning the instrument panel
Clean with a damp cloth, then dry with a dry cloth.
Avoid cleaner or polish that increases the gloss of the upper portion of
the instrument panel. The dull finish in this area helps protect the driver
from undesirable windshield reflection.
Maintenance and care
173

MOTORCRAFT PART NUMBERS
Component 4.6L SOHC V8 engine
Air filter element FA-1668
Fuel filter FG-986B
Battery (standard) BXT-59
Battery (optional) BXT-65-650
Oil filter FL-820-S
PCV valve EV-98
Spark plugs* AWSF-32P
* Refer to Vehicle Emissions Control Information (VECI) decal for spark
plug gap information.
REFILL CAPACITIES
Fluid Ford Part Name Capacity
Engine oil (includes
filter change)Motorcraft 5W-30 Super
Premium Motor Oil4.7L
(5.0 quarts)
Brake fluid High Performance DOT 3
Motor Vehicle Brake FluidFill to line on
reservoir
Power steering fluid Motorcraft MERCONtATF Fill to line on
reservoir
Transmission fluid Motorcraft MERCONtV ATF 13.1L
(13.9 quarts)
Engine coolant
1Premium Engine Coolant 15.0L
(15.8 quarts)
Fuel tank N/A 71.9L
(19.0 gallons)
Rear axle lubricant
2Motorcraft SAE 80W90
Premium Rear Axle Lubricant1.8-1.9L
(3.75-4.0 pints)
Windshield washer
fluidUltra-Clear Windshield
Washer ConcentrateFill to line on
reservoir
1Use Ford Premium Engine Coolant (green in color). DO NOT USE Ford
Extended Life Engine Coolant (orange in color). Refer toAdding engine
coolant, in the Maintenance and Care chapter.
2Rear axles are considered lubricated for life when the vehicle is used
for normal service. See your Scheduled Maintenance Guide for Severe
Duty requirements. Traction-Lok axles use 2.2±2.4L (4.75±5.0 pints) of
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175

rear axle lubricant. Service refill capacities are determined by filling the
rear axle 6 mm to 14 mm (1/4 inch to 9/16 inch) below the bottom of
the filler hole. Add 118 ml (4 oz.) of additive friction modifier
C8AZ-19B546±A, Ford specification EST-M2C118±A for complete refill of
Traction-Lok axles.
LUBRICANT SPECIFICATIONS
Item Ford part
nameFord part
numberFord
specification
Brake fluid High
Performance
DOT 3 Motor
Vehicle Brake
FluidC6AZ-19542-AB ESA-M6C25-A
and DOT 3
Door
weatherstripsSilicone
LubricantF7AZ-19G208-BA
and
F5AZ-19553-AAESR-M13P4-A
Engine coolant Ford Premium
Engine CoolantE2FZ-19549-AA
(in Oregon,
F5FZ-19549-CC,
in Canada,
Motorcraft
CXC-10)ESE-M97B44-A
Engine oil Motorcraft
5W-30 Super
Premium Motor
OilXO-5W30-QSP WSS-M2C153-G
with API
Certification
Mark
Hinges, latches,
striker plates,
fuel filler door
hinge and seat
tracksMulti-Purpose
GreaseDOAZ-19584-AA
or
F5AZ-19G209-AAESB-M1C93-B or
ESR-M1C159-A
Lock cylinders Penetrating and
Lock LubricantE8AZ-19501-B none
Power steering
fluidMotorcraft
MERCONtAT FXT-2-QDX MERCONt
Automatic
transmission
(4R70W)Motorcraft
MERCONtV
AT FXT-5-QM
MERCONtV
Capacities and specifications
176