Page 786 of 1226

303-03B-16 Engine Cooling - 2.OL Duratec-HE (M14) 303-03B-16
DIAGNOSIS AND TESTING
Item Description
I A 1 Opening temperature I
I B I Fully open temperature I
NOTE:Generally, most thermostats maintain a
coolant temperature between
88OC (1 90°F) and
92OC (1 98OF) although dual stage electric
thermostats may increase the coolant temperature
up to
100°C (212OF) under light engine load
conditions.
The engine should start cleanly and the ECT value
will rise quite quickly with smooth progression. If
the ECT signal appears unstable or erratic, the
ECT sensor, electrical connector and wiring
harness to the PCM need to be visually inspected
for damage, chafing or water ingress.
The temperature should rise to approximately
90°C
for a thermostat that has an 88OC value. The signal
value will then fall as cooler coolant enters the
engine.
If the ECT value fails to maintain a constant value
and falls back to lower figures, typically between
60°C (140°F) and 70°C (1 50°F), the thermostat
and its sealing function within the thermostat
housing must be checked.
5, INSTALL a new thermostat housing and
thermostat housing gasket as necessary.
REFER to: Thermostat Housing (303-03 Engine
Cooling
- 2.OL Duratec-HE (M14), Removal
and Installation).
6. Carry out another road test from step 1 using
the same criteria to confirm that the concern
has been rectified.
7. Using the WDS, clear the PCM keep alive
memory (KAM) or electrically erasable
programmable read only memory (EEPROM)
so that new drive values can be learnt.
2006.0 Fiesta 1212006 G426582en
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Page 790 of 1226
303-03B-20 Engine Cooling - 2.OL Duratec-HE (M14) 303-03B-20
REMOVAL AND INSTALLATION
Item Description
1
2
6. To install, reverse the removal procedure.
Coolant pump pulley
Coolant pump retaining bolts
3
4
2006.0 Fiesta 1u2oos G421227en
- --
Coolant pump
Coolant pump gasket
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Page 795 of 1226
303-03B-25 Engine Cooling - 2.OL Duratec-HE (M14) 303-03B-25
REMOVAL AND INSTALLATION
7. Disconnect the radiator hose and the heater Discard the gasket.
hose from the coolant outlet connector. ,
Installation
8. Disconnect the coolant expansion tank hose
from the coolant outlet connector. 1. N0TE:lnstall a new coolant outlet connector
gasket.
9. Disconnect the thermostat housing coolant
hose from the coolant outlet connector. To
install, reverse the removal procedure.
10. Remove the coolant outlet connector.
2006.0 Fiesta 1212006 G421228en
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Page 816 of 1226

Fuel Charging and Controls - 2.OL
303-04B-8 Duratec-HE (M14) 303-04B-8
DIAGNOSIS AND TESTING
lntake manifold
item Description
I 1 I Intake manifold tuning (IMT) swirl plates I Inspection and Verification
121
lntake manifold runner control (IMRC)
throttle plates
The intake manifold for both Ethanol
E85 and
standard unleaded fueled vehicles is the same
construction.
Built into the intake manifold, are the
IMRC throttle
plates and IMT swirl plates.
Under low demand throttle conditions, the air
charge is delivered to the cylinder head intake ports
through the primary air intake chambers. The clean
flow of the air charge is disturbed by the IMT swirl
plates to assist in the mixing of the air fuel mixture
at the fuel injectors.
1. Verify the customer concern.
2. Visually inspect for obvious signs of mechanical
or electrical damage.
Visual lnspection Chart
I Mechanical I Electrical I
- Fuel leak(s)
- Vacuum line(s)
- Gasket(s)
- Seal(s)
- Fuel injector(s)
- Throttle body
- Fuel rail
- Powertrain control
module (PCM)
- Wiring harness
- Electrical
connector(s)
- Throttle body
- Fuel injector(s)
2006.0 Fiesta 1212006 GI 65371en
During high demand throttle conditions, the IMRC
throttle plates are opened and the air charge is - Fuel supply line
allowed to use both primary and secondary intake
chambers. This means a higher volume of air 3. If an obvious cause for an observed or reported
charge can be accommodated by the intake concern
is found, correct the cause (if
possible) (
before proceeding to the next step. \. . manifold. During this high demand throttle
condition, the IMT swirl plates are fully open so as
4. If the cause is not visually evident, verify the
not to restrict the air charge flow.
symptom and refer to the Symptom Chart.
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Page 826 of 1226

Fuel Charging and Controls - 2.OL
303-048-1 8 Duratec-HE (M14) 303-048-1 8
DIAGNOSIS AND TESTING
Symptom Possible Sources
Action -
lncorrector contaminated fuel. CHECK
for signs of
tion such as strange odors from
the fuel tank.
If contaminated fuel is found,
DRAIN the complete fuel
system. FLUSH the
through with clean gasoline.
REFER to: Fuel Tank Draining
(31
0-OOA, General Proced-
u res).
INSTALL a new fuel filter.
INSPECT the fuel injectors.
CLEAN the fuel injectors or
INSTALL a new set of injectors
as required only after the
checks have been carried out.
INSTALL a new fuel rail.
REFER to: Fuel Injection
Supply Manifold
(303-04C,
Removal and Installation). -- -
Positive crankcase ventilation
(PCV) system.
Worn or damaged valve
guide(s), piston ring(s), cylinder
bore(s), cylinder head or
gasket. INSPECT
for visible signs of
damage or blockage. CLEAN,
REPAIR or INSTALL new parts
as necessary.
REMOVE the cylinder head.
INSPECT the cylinder head,
pistons and cylinder bores for
signs of wear or damage.
REFER to: Cylinder Head (303-
01 C, In-vehicle Repair).
2006.0 Fiesta 1212006 GI 65371 en
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Page 827 of 1226

Fuel Charging and Controls - 2.OL
303-04B-19 Duratec-HE (M14) 303-04B-19
DIAGNOSIS AND TESTING
White smoke
Possible Sources Action
Incorrect or contaminated fuel. CHECK for signs of contamina-
tion such as strange odors from
the fuel tank.
If contaminated fuel is found,
DRAIN the complete fuel
system. FLUSH the fuel system
through with clean gasoline.
REFER to: Fuel Tank Draining
(31
0-OOA, General Proced-
u res).
INSTALL a new fuel filter.
INSPECT the fuel injectors.
CLEAN the fuel injectors or
INSTALL a new set of injectors
as required only after the
checks have been carried out.
INSTALL a new fuel injection
supply manifold.
REFER to: Fuel Injection
Supply Manifold
(303-04C,
Removal and Installation).
Coolant in the combustion
chamber. CARRY OUT a cooling system
pressure test.
REFER to: Engine Cooling
(303-03C, Diagnosis and
Testing).
REMOVE the cylinder head.
INSPECT the cylinder head,
cylinder head gasket and
cylinder bores for wear or
damage. REFER to: Cylinder Head (303-
01
C, In-vehicle Repair).
2006.0 Fiesta 1212006 GI 65371 en
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Page 829 of 1226

Fuel Charging and Controls - 2.OL
303-04B-21 Duratec-HE (M14) 303-04B-21
DIAGNOSIS AND TESTING
Symptom
Engine knock at idle
Possible Sources Action
Fuel injectors.
INSPECT the fuel injectors.
CLEAN the fuel injectors or
INSTALL a new set of injectors
as required only after the
checks have been carried out.
Fuel rail fuel pressure sensor.
Carry out a full engine
diagnosis using the guided
diagnostic menu in WDS.
Low cylinder compression.
CHECK the engine compres-
sion.
Worn or damaged
valve(s),
tappet(s) or camshaft(s).
REMOVE the cylinder head.
INSPECT the cylinder head,
valves, tappets and camshafts
for signs of wear or damage.
REFER to: Cylinder Head (303-
01 C, In-vehicle Repair).
Damaged cylinder head gasket. REMOVE the cylinder head.
INSPECT the cylinder head
gasket and cylinder bores for
wear or damage.
REFER to: Cylinder Head (303-
01 C, In-vehicle Repair).
Low engine oil level.
CHECK the engine oil level.
REFILL as necessary.
Incorrect or contaminated fuel.
-
KS. CHECK
for signs of contamina-
tion such as strange odors from
the fuel tank.
If contaminated fuel is found,
DRAIN the complete fuel
system. FLUSH the fuel system
through with clean gasoline.
REFER to: Fuel Tank Draining
(31
0-OOA, General Proced-
u res).
INSTALL a new fuel filter.
INSPECT the fuel injectors.
CLEAN the fuel injectors or
INSTALL a new set of injectors
as required only after the
checks have been carried out. INSTALL a new fuel rail.
REFER to: Fuel Injection
Supply Manifold
(303-04C,
Removal and Installation).
Carry out a full engine
diagnosis using the guided
diagnostic menu in WDS.
2006.0 Fiesta 1212006 GI 65371 en
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Page 832 of 1226

Fuel Charging and Controls - 2.OL
303-04B-24 Duratec-HE (M14) 303-04B-24
REMOVAL AND INSTALLATION
Throttle Body
1. Remove the components in the order
indicated in the following
illustration(s) and
tablelsl.
Item Description Item Description
See Removal ~etaii-
1 7 I Throttle body 1 4. Turn the ignition key to the OFF position.
1
2 I I
2. To install, reverse the removal procedure.
3
4
5
6
Removal Details
8
Air cleaner intake pipe retaining clip
Air cleaner intake pipe
Item 2 Air cleaner intake pipe
See Installation Detail
Throttle body gasket
Air cleaner outlet pipe retaining clip
Air cleaner outlet pipe retaining clip
Air cleaner outlet pipe and resonator
See Removal Detail
Throttle body electrical connector
1. Detach the air cleaner intake pipe from the
air cleaner intake pipe duct.
3. N0TE:Do not press the accelerator pedal
during the initialization period as this will
prevent the complete initialization of the
throttle body.
Turn the ignition key to position
II and wait
for one minute to initialize the throttle body.
2006.0 Fiesta 1212006 G421320en
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