2007 FORD FIESTA Workshop Manual

Fuel Charging and Controls - 1.25L
Duratec-1 6V (Sigma)ll.4L Duratec-1 6V
303-04A-3 (Sigma)ll .6L Duratec-1 6V (Sigma) 303-04A-3 - -
DIAGNOSIS AND TESTING
Fuel Charging and Controls
Principles Of Operation
REFER to: Acceleration Control (31 0-02A,
Diagnosis and Testing).
lnspection and Verification
1. Verify the customer concern.
2. Visually inspect for obvious signs of mechanical
or electrical damage.
Visual Inspection Chart
I Mechanical I Electrical I
- Fuel leak(s)
- Blocked or contamin-
ated fuel filter
- Fuel rail
- Vacuum line(s)
- Throttle body
- Wiring harness
- Electrical
connector(s)
- Fuel injector(s)
- Throttle body
I
3. If an obvious cause for an observed or reported
concern is found, correct the cause (if possible)
before proceeding to the next step.
4. If the cause is not visually evident, verify the
symptom and refer to WDS.
2006.0 Fiesta 1212006 G28679en
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Fuel Charging and Controls - 1.25L
Duratec-1 6V (Sigma)ll.4L Duratec-I 6V
303-04A-4 (Sigma)ll.GL Duratec-1 6V (Sigma) 303-04A-4
REMOVAL AND INSTALLATION
Throttle Body(23 198 0)
Removal 2. N0TE:Do not press the accelerator pedal
during the initialization period as this will
1. Disconnect the air cleaner outlet pipe from
prevent the complete initialization of the
the throttle body. throttle body.
2. Remove the throttle body retaining bolts. Turn
the ignition key to position
II and wait
for one minute to
initialize the throttle body.
3. Turn the ignition key to the OFF position.
3. Disconnect the throttle body electrical
connector and remove the throttle body.
I nin
1. To install, reverse the removal procedure.
2006.0 Fiesta 1212006 GI 46266en
procarmanuals.com

Fuel Charging and Controls - 1.25L
Duratec-1 6V (Sigma)llI4L Duratec-1 6V
(Sigma)llI6L Duratec-1 6V (Sigma)
REMOVAL AND INSTALLATION
Fuel Charging Wiring Harness(36 437 0)
Removal
1. Remove the air cleaner. For additional
5. N0TE:lt is necessary to lift the red locking
tab before the electrical connector can be
disconnected.
information, refer to Section
303-12 [Intake the throttle body electrical Air Distribution and Filtering].
connector.
2. Disconnect the spark plug wires from the
ignition coil.
6. Disconnect the fuel charging wiring harness
electrical connector.
3. Disconnect the engine coolant temperature
(ECT) sensor electrical connector.
(
7. Remove the positive crankcase ventilation
(PCV) hose.
4. Disconnect the camshaft position (CMP)
sensor electrical connector.
2006.0 Fiesta 1212006 GI 89082en
procarmanuals.com

Fuel Charging and Controls - 1.25L
Duratec-1 6V (Sigma)ll.4L Duratec-1 6V
(Sigma)ll .6L Duratec-1 6V (Sigma)
REMOVAL AND INSTALLATION
8. Disconnect the fuel injector electrical
connectors and remove the fuel charging
wiring harness.
Installation
I. To install, reverse the removal procedure.
2006.0 Fiesta 1212006 GI 89082en
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Fuel Charging and Controls - 1.25L
Duratec-1 6V (Sigma)llI4L Duratec-1 6V
303-04A-7 (Sigma)llI6L Duratec-1 6V (Sigma) 303-04A-7
REMOVAL AND INSTALLATION
Fuel Injection Supply Manifold(23 450 0)
Removal
WARNINGS:
A Do not smoke or carry lighted tobacco or
open flame of any type when working on
or near any fuel related components.
Highly flammable vapors are always
present and can ignite. Failure to follow
these instructions may result in personal
injury.
A This procedure involves fuel handling. Be
prepared for fuel spillage at all times and
always observe fuel handling precautions.
Failure to follow these instructions may
result in personal injury.
5. Disconnect the fuel injector electrical
connectors and position the wiring harness
to one side.
1. Release the fuei system pressure. For
additional information, refer to 6. Disconnect the vacuum line from the fuel
Section
31 0-00 [Fuel System - General pressure
regulator.
Information].
2. Disconnect the battery ground cable. For
additional information, refer to
Section
414-01 [Battery, Mounting and
Cables].
3. Remove the air cleaner. For additional
information, refer to Section
303-12 [Intake
Air Distribution and Filtering].
4. Remove the positive crankcase ventilation
(PCV) hose.
7. N0TE:Fuel supply line connectors are white
or are identified by a white band. Fuel return
line connectors are red or are identified by
a red band.
2006.0 Fiesta 1212006 GI 89083en
procarmanuals.com

Fuel Charging and Controls - 1.25L
Duratec-I 6V (Sigma)ll.4L Duratec-I 6V
(Sigma)ll.6L Duratec-1 6V (Sigma)
REMOVAL AND INSTALLATION
Disconnect the fuel supply line from the fuel 10. Remove the fuel pressure regulator.
injection supply manifold. For additional
information, refer to Section 31 0-00 [Fuel
System
- General Information].
8. N0TE:Fuel supply line connectors are white
or are identified by a white band. Fuel return
line connectors are red or are identified by
a red band.
Disconnect the fuel return line from the fuel
injection supply manifold. For additional
information, refer to Section 31 0-00 [Fuel
System
- General Information].
9. Remove the fuel injection supply manifold.
11. Remove and discard the O-ring seal.
12.
N0TE:Discard the fuel injector O-ring seals.
Remove the fuel injectors from the fuel
injection supply manifold.
1. Lift the retaining clip.
2. Slide the retaining clip. .
3. Pull the fuel injector.
2006.0 Fiesta 1212006 GI 89083en
procarmanuals.com

Fuel Charging and Controls - 1.25L
Duratec-I 6V (Sigma)llI4L Duratec-1 6V
303-04A-9 (Sigma)ll .6L Duratec-1 6V (Sigma) 303-04A-9
REMOVAL AND INSTALLATION
13. Remove and discard the O-ring seals.
Installation
WARNINGS:
A Do not smoke or carry lighted tobacco or
open flame of any type when working on
or near any fuel related components.
Highly flammable vapors are always
present and can ignite. Failure to follow
these instructions may result in personal
injury.
( A This procedure involves fuel handling. Be ' prepared for fuel spillage at all times and
always observe fuel handling precautions.
Failure to follow these instructions may
result in personal injury.
1. N0TE:lnstall new fuel injector O-ring seals.
N0TE:lnstall a new fuel pressure regulator O-ring
seal.
.
N0TE:Lubricate the O-ring seals with clean engine
oil to aid installation.
To install, reverse the removal procedure.
2006.0 Fiesta IZIZOO~ GI 89083en
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