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Glow plug pre-heat indicator
With the key in the ON position,
the
light will illuminate if
glow plug heat is necessary as a
starting aid. Wait until the light goes
off before starting. The light should always illuminate briefly, when the
ignition key is in the ON position. If the light does not illuminate, there
may be a problem. Refer toCold weather startingin theDriving
chapter of this supplement. After the engine starts, the light should
remain off. The light should always illuminate at least momentarily when
the engine is cold and the ignition is turned to ON. If it does not
illuminate, the glow plug system should be checked and repaired
promptly to avoid difficulty in cold starting.
Waterinfuel
During refueling, it is possible for water-contaminated diesel fuel to be
pumped into your tank. Your vehicle fuel system is equipped with a fuel
filter/water separator to remove water from the fuel. The WATER IN
FUEL light will illuminate when the ignition is turned to START (as part
of the light function check) and when the FCM/HFCM has a significant
quantity of water in it.
Type A
Type B
Type C
If the light illuminates when the engine is running, stop the vehicle as
soon as safely possible, shut off the engine, then drain the FCM/HFCM.
Refer toDraining the FCM/HFCM and changing the fuel filtersin the
Maintenance and Specificationschapter of this supplement for the
drain procedure. Allowing water to stay in the system could result in
extensive damage to, or failure of, the fuel injection system.
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Supplement
USA(fus)
Instrument Cluster
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Page 8 of 72

Do not drain the water separator while the engine is running.
Fuel may ignite if the separator is drained while the engine is
running or the vehicle is moving.
Engine air filter (if equipped)
The engine air filter warning light illuminates when the air filter
restriction gauge reaches the CHANGE FILTER mark.
Type A
Type B
The condition should be verified by inspecting the underhood air filter
restriction gauge; the warning light is only a secondary indicator. Always
use the underhood air filter restriction gauge to determine when the air
filter element needs to be changed.
The vehicle may be driven with the engine air filter warning light
illuminated/or when the underhood air filter restriction gauge has moved
to the CHANGE FILTER mark for up to 250 miles (400 km) without
damaging the engine or related components. However, the air filter
element must be replaced at the earliest opportunity. Refer toAir filter
restriction gauge (if equipped)in this chapter for more information.
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Supplement
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Instrument Cluster
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Page 9 of 72

AIR FILTER RESTRICTION GAUGE (IF EQUIPPED)
The restriction gauge, located on
the upper housing of the air cleaner
assembly, measures the vacuum
inside the air cleaner. The more the
air cleaner is restricted (dirty,
clogged), the higher the vacuum
reading
Check the air filter restriction gauge
whenever the hood is raised to
perform general engine maintenance
at least every 7,500 miles (12,000 km).
If the vehicle is operated in extremely dusty conditions, check the gauge
at least every 500 miles (800 km), or two weeks, whichever comes first.
Change the air filter when the gauge reads 25 inches (635 mm). Engine
performance and fuel economy are adversely affected when the
maximum restriction is reached.
Blowing-out the air filter element with compressed air is not
recommended as the compressed air may damage the filter paper.
Note:It is not possible to determine the level of filter clogging by visual
appearance alone. A filter which appears to be dirty may actually have
several thousand miles (kilometers) of life remaining.
Always use the underhood air filter restriction gauge to
determine when the air filter element needs to be changed. The
warning light on the instrument cluster should not be used
exclusively for determining when the air filter element needs
changing.
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Supplement
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Instrument Cluster
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Page 10 of 72

After installation of the new filter
element, reset the gauge by pressing
the reset button on top of the
gauge.
Note:If the vehicle is operated in a
heavy snow storm, in blowing snow
or the vehicle is equipped with a
snowplow, the engine air filter
element may become partially
clogged with snow and/or ice. If this
occurs, the engine may experience a
significant reduction in power output. The vehicle may be driven under
these conditions for up to 100 miles (160 km) without damage to the
engine or related components.
At the earliest opportunity, clear all snow and ice from the air induction
system and reset the restriction gauge by pressing the button on the end
of the gauge. If the air filter restriction gauge reads 25 inches (635 mm)
after clearing snow and/or ice, then replace the filter. Reset filter
restriction gauge after changing the air filter element.
The air filter warning light on the instrument cluster may be used, in
addition to the underhood restriction gauge, to monitor the condition of
the air filter element. Refer to theEngine air filterwarning light in this
chapter of the supplement.
Engine boost gauge (if equipped)
Indicates the amount of pressure in
the engine. Driving with your
pointer continuously at the high end
of the scale may damage the engine.
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Supplement
USA(fus)
Instrument Cluster
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Page 13 of 72

Your vehicle is also equipped with a bypass relief valve, located on the
fuel control module, which provides fuel flow to the engine if the fuel
pickup should become plugged by ice or wax. To allow this bypass valve
to function and avoid engine fuel starvation, it is recommended that,
during cold weather operation 32°F (0°C) or below, the fuel level in your
tank should not be allowed to drop below
1 4full. This will help prevent
air from entering the fuel system and stalling the engine.
In cold weather below 32°F (0°C) your diesel engine will slowly increase
to a higher idle speed if left idling in P (Park). As the engine warms-up,
the engine sound level will decrease due to the activation of
PCM-controlled sound reduction features.
If your vehicle is operated in a heavy snow storm or blowing snow
conditions, the engine air induction may become partially clogged with
snow and/or ice. If this occurs, the engine may experience a significant
reduction in power output. At the earliest opportunity, clear all the snow
and/or ice away from the air induction inlet.
Operation in snow
Vehicle operation in heavy snowfall or in dry loose snow that may swirl
around the front of the vehicle may feed excessive amounts of snow into
the air intake system. This could plug the air cleaner with snow and
cause the engine to stall and/or lose power.
Refer toAir filter restriction gaugeandEngine air filterin the
Instrument Clusterchapter of this supplement for more information.
Operation in standing water
Ingestion of water into the diesel engine can result in immediate and
severe damage to the engine. If driving through water, slow down to
avoid splashing water into the intake. If the engine stalls, and ingestion
of water into the engine is suspected, do not try to restart the engine.
Consult your dealer for service immediately.
Engine block heater (if equipped)
Refer to theDrivingchapter in theOwner’s Guide.
2006 Econoline(eco)
Supplement
USA(fus)
Driving
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Page 26 of 72
IDENTIFYING COMPONENTS IN THE ENGINE COMPARTMENT
E-Series
1. Windshield washer fluid reservoir
2. Automatic transmission dipstick
3. Engine oil filler cap
4. Secondary fuel filter assembly
5. Power steering fluid reservoir
6. Brake fluid reservoir
7. Engine coolant reservoir
8. Air filter assembly
The Fuel Conditioner Module (FCM) is located on the driver-side of the
vehicle next to the transmission case.
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Supplement
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Maintenance and Specifications
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Page 27 of 72
F-Super Duty
1. Automatic transmission dipstick (if equipped)
2. Engine oil fill
3. Engine oil filter
4. Engine-mounted fuel filter assembly
5. Engine coolant reservoir
6. Brake fluid reservoir
7. Clutch fluid reservoir (if equipped)
8. Underhood relay box
9. Battery (dual batteries shown)
10. Power steering fluid reservoir
11. Air filter assembly
12. Engine oil dipstick
13. Windshield washer fluid reservoir
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Supplement
USA(fus)
Maintenance and Specifications
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Page 30 of 72

Fueling tips
If the engine fails to start in 30 seconds, turn the key to the OFF
position and wait 30 seconds before trying again.
Truck stops have pumps and nozzles designed for larger, heavy-duty
trucks. When refueling at truck stops: if the nozzle shuts off repeatedly
when refueling, wait 5–10 seconds; then use a slower rate of flow (don’t
depress the nozzle trigger as far).
If air is allowed to enter the fuel system (during fuel filter change or if
you run out of fuel) the engine will purge the trapped air as it runs. The
engine may run rough and produce white smoke while air is in the
system. This is normal and should correct itself in a short time.
An engine that suddenly becomes noisy or operates poorly after a fuel fill
could be using substandard fuel (i.e., high water content, low cetane
rating or gasoline in the fuel). Diesel fuel should be purchased from a
reputable station which sells a large amount of diesel fuel.
Care should be taken whenever diesel fuel is stored. Use only clean,
approved containers which will prevent the entry of dirt or water.
Diesel fuel must not be stored in a galvanized container. The fuel will
dissolve the zinc in a galvanized container. The zinc will then remain in
solution until it is run through the engine where it will be deposited in
the fuel injectors causing expensive-to-repair damage.
Diesel fuel dispensing nozzle fill rate
This truck is equipped with a fuel fill pipe which is able to accept fuel up
to 20 gallons per minute from an 1 1/8 inch fuel dispensing nozzle.
Pumping fuel at greater flow rates may result in premature nozzle
shut-off or spitback.
FUEL CONDITIONER MODULE (FCM - E-SERIES)/HORIZONTAL
FUEL CONDITIONING MODULE (HFCM - F-SUPER DUTY - FUEL
FILTER/WATER SEPARATOR
HFCM - F-Super Duty
The vehicle is equipped with a Horizontal Fuel Conditioning Module
(HFCM) located on the frame-rail under the driver-side floorboard near
the transmission.
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Supplement
USA(fus)
Maintenance and Specifications
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