engine FORD EXPEDITION 1997 1.G Workshop Manual

Relearning idle conditions
Because your vehicle's engine is
electronically controlled by a
computer, some control conditions
are maintained by power from the
battery. When the battery is
disconnected or a new battery is
installed, the computer must
ªrelearnº its idle conditions before
your vehicle will drive properly. To
complete this process:
1. Put the gearshift in P(Park).
2. Turn off all accessories, and
start the engine.
3. Let the engine idle for at least
one minute.
4.The relearning process will
automatically complete as you
drive the vehicle.
²If you do not allow the engine to
relearn its idle, the idle quality
of your vehicle may be adversely
affected until the idle is
eventually relearned.
²If the battery has been
disconnected or a new battery
has been installed, the clock and
preset radio stations must be
reset once the battery is
reconnected.
²
Always dispose of used
automotive batteries in a
responsible manner. Follow your
community's standards for
disposal. Call your local
recycling center to find out
more about recycling automotive
batteries.
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AIR CLEANER FILTER
MAINTENANCE
Refer to the ªService Guideº for
the appropriate intervals for
changing the air cleaner filter.
Do not start your engine
with the air cleaner
removed and do not remove it
while the engine is running.
CHANGING THE AIR FILTER
1. Loosen the clamp that secures
the air cleaner in place.
2. Separate the two halves of the
air cleaner.
3. Remove the air filter element
from the open end of the engine
air cleaner and replace it with a
new element. Be careful not to
crimp the filter edges between
halves. This could cause filter
damage if not properly seated.
4. Replace the two halves of the
air cleaner and secure the clamp.
For information on replacement air
filter elements, refer to the
Capacities and specifications
chapter.
CHECKING AND REPLACING
WIPER BLADES
Checking wiper blades
Check the windshield wiper blades
at least twice a year or whenever
they seem to work less effectively
than usual. Substances such as
tree sap and some hot wax
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vehicle can be operated on
non-California fuels. However, even
though your engine will perform
adequately on other gasolines, the
performance of the emission
control devices and systems may
be adversely affected. Repair of
damage caused by using a fuel that
your vehicle was not designed for
may not be covered by your
warranty.
Octane recommendations
Your vehicle is designed to use
regular gasoline with an (R+M)/2
octane rating of 87. We do not
recommend gasolines labeled as
ªregularº in high altitude areas that
are sold with octane ratings of 86
or even less.
Do not be concerned if your
vehicle sometimes knocks lightly.
However, if it knocks heavily under
most driving conditions on the
recommended octane fuel, see
your dealer or a qualified service
technician to prevent any engine
damage.
Fuel quality
If you are experiencing starting,
rough idle or hesitation problems
try a different brand of fuel. If the
condition persists, see your dealer
or a qualified service technician.
The American Automobile
Manufacturers Association (AAMA)
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issued a gasoline specification to
provide information on high quality
fuels that optimize the
performance of your vehicle. We
recommend the use of gasolines
that meet the AAMA specification
if they are available.
It should not be necessary to add
any aftermarket products to your
fuel tank if you continue to use a
high-quality fuel.
Cleaner air
Ford approves the use of gasolines
to improve air quality, including
reformulated gasolines, that
contain oxygenates such as a
maximum of 10% ethanol or 15%
MTBE. There should be no more
than 5% methanol with cosolvents
and additives to protect the fuel
system.
Filling the fuel tank
1. Turn the engine off. After
opening the fuel door, remove the
cap carefully and slowly by turning
it counterclockwise
1¤4turn until it
stops. Pull to remove the cap. A
tether attaches the cap to the fuel
filler pipe.
2. Make sure that you pump
unleaded fuel and put the nozzle
inside the fuel filler pipe.
²To optimize fill, it may be
necessary to reposition the
nozzle in the filler pipe.SNAP
THENPULLTO
REMOVESNAPON
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²The help reduce early nozzle
shut offs and fuel spillage, park
your vehicle so that the fuel
filler door is level.
²Avoid excessively fast fuel
dispensing rates (over 38 L [10
gallons] per minute).
²If you spill any fuel on the body
of your vehicle, clean it off
immediately. The fuel may dull
or soften the paint if it is not
washed off promptly.
3. To replace the fuel cap, align
the tabs on the cap with the
notches on the filler pipe. Turn it
clockwise until it stops.
4. Push the fuel door closed.
If the check engine warning light
illuminates and remains illuminated
while the engine is started, the
fuel cap may not be properly
seated. Turn off the engine,
remove the fuel cap and replace it.
being sure to align the cap
properly.
If the fuel cap is lost, replace it
with an authorized Motorcraft or
equivalent part.
Calculating fuel economy
To accurately calculate your
vehicle's fuel economy:
1. Fill the tank completely and
record the initial odometer
reading.
2. Each time you fill the tank,
record the amount of fuel added
(in liters or gallons).
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193

3. After at least three to five fuel
tank fill-ups, fill the fuel tank and
record the current mileage
reading.
4. Use one of the following
equations to calculate fuel
economy.
Liters used x 1004Total
kilometers traveled
Total miles traveled4Total
gallons used
Keep a record for at least one
month. This will provide an
accurate estimate of the vehicle's
fuel economy.
WHAT YOU SHOULD KNOW
ABOUT THE EMISSION
CONTROL SYSTEM
For more information on your
vehicle's emission control system,
refer to the Vehicle Emission
Control Information Decal located
on the inside, left of the engine
compartment.
The catalytic converter enables the
vehicle's emission control system
to operate properly.
Follow these guidelines to ensure
proper emission system operation:
²Use only unleaded fuel.
²Avoid running out of fuel.
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²Do not turn off the ignition
while your vehicle is in motion.
²Have maintenance performed
according to intervals in the
ªService Guideº.
If you notice one or more of the
following, the emission system may
not be functioning properly; have
the vehicle serviced as soon as
possible:
²Fluid leaks
²
lights illuminate in
the instrument cluster and
remain lit
²Strange odors
²Engine runs for more than five
seconds after shut off or engine
misfires, surges, stalls or
backfires
²Loss of oil pressure
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Important emission control
information
By law, anyone who manufacturers,
repairs, services, leases, trades
vehicles or supervises a fleet of
vehicles is not permitted to
intentionally remove an emission
control device or prevent it from
working. Do not make any
unauthorized changes to the
vehicle or engine. Changes that
cause more unburned fuel to reach
the exhaust system can increase
the temperature of the engine or
exhaust system.
When your vehicle is serviced,
never use a metal exhaust
collector. The use of a metal
collector may melt or deform
plastic parts.
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.
Preparing your vehicle 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 diagnostic (OBD II)
system. If your vehicle's powertrain
system or battery has just been
serviced, the OBD II system is
reset to a condition unready for
I/M testing. To ready the OBD II
system for I/M testing, the law
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specifies that additional city and
highway driving is necessary to
complete the check of the OBD II
system.
The driving modes required to
reach the ready condition consist
of a minimum of 30 minutes of city
and highway driving:
²At least 20 minutes driving in
stop and go city-type traffic with
at least four idle periods.
²At least ten minutes of driving
on an expressway or highway.
Before completing the above
driving modes, the engine must be
warmed up and at operating
temperature. Once started, the
vehicle must not be turned off
during these modes.
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Cleaning the wheels
Wash the wheels with the same
detergent you use to clean the
body of your vehicle. Do not use
acid-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.
Cleaning the engine
Engines are more efficient when
they are clean because grease and
dirt buildup act as insulators and
keep the engine warmer than
normal. Follow these guidelines to
clean your engine:
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.
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