fuel FORD MUSTANG 2003 Workshop Manual

REMOVAL AND INSTALLATION
Throttle Body
Removal and Installation
WARNING: Do not smoke or carry lighted tobacco or open flame of any type when
working on or near any fuel related components. Highly flammable mixtures are always present
and may ignite. Failure to follow these instructions may result in personal injury.
CAUTION: The throttle body bore and plate area have a special coating and cannot be
cleaned.
1. Remove the air cleaner outlet tube (9B659). For additional information, refer to Section 303 - 12 .
2. Disconnect the throttle position (TP) sensor electrical connector.
3. Disconnect the accelerator cable (9A758) and (if equipped) the speed control actuator cable (9A825).
4. NOTE: Discard the throttle body gasket after removing the throttle body.
Remove the throttle body. zRemove the nuts.
z Remove the bolts.
SECTION 303-
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REMOVAL AND INSTALLATION
Fuel Injectors
Removal and Installation
WARNING: Do not smoke or carry lighted tobacco or open flame of any type when
working on or near any fuel related components. Highly flammable mixtures are always present
and may ignite. Failure to follow these instructions may result in personal injury.
WARNING: Fuel in the fuel system remains under high pressure even when the engine is
not running. Before working on or disconnecting any of the fuel lines or fuel system
components, the fuel pressure must be relieved. Failure to follow these instructions may result
in personal injury
1. Remove the supply manifold. For additional information, refer to Supply Manifold in this section.
2. Remove the six fuel injectors from the supply manifold.
3. CAUTION: The retaining clip must be in the upper groove on the injector or the
injector may become loose.
NOTE: Inspect the two O- rings from each fuel injector. Install new O- rings as needed.
NOTE: Lubricate the new O- rings with clean engine oil to aid installation.
To install, reverse the removal procedure.
SECTION 303-
04A: Fuel Charging and Controls — 3.8L 2003 Mustang Workshop Manual Material
Item Specification
SAE 5W-
20 Premium Synthetic
Blend Motor Oil
XO- 5W20-QSP or equivalent WSS-
M2C153-
H Klj . 1 ba
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REMOVAL AND INSTALLATION
Fuel Charging Wiring Harness
Removal and Installation
WARNING: Do not smoke or carry lighted tobacco or open flame of any type when
working on or near any fuel related components. Highly flammable mixtures are always present
and may ignite. Failure to follow these instructions may result in personal injury.
1. Disconnect the battery ground cable. For additional information, refer to Section 414 - 01 .
2. Remove the upper intake manifold. For additional information, refer to Section 303 - 01A .
3. Disconnect the following electrical connectors. z42- pin engine bulkhead connector
z 16- pin connector
z 8-pin connector
z A/C pressure switch
4. Separate the wiring harness from the dash panel.
5. Disconnect the intake manifold runner control (IMRC) actuator electrical connector.
SECTION 303-
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6. Disconnect the RH heated oxygen sensor (HO2S) electrical connector and the 16-
pin electrical
connector.
7. Disconnect the crankshaft position (CKP) sensor electrical connector.
8. Disconnect the camshaft position (CMP) sensor electrical connector.
9. NOTE: Right side shown, left side similar.
Disconnect the six fuel injector electrical connectors. Klj . 2 ba
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10. Disconnect the cylinder head temperature (CHT) sensor electrical connector on the back of the
left cylinder head.
11. Disconnect the engine oil pressure sender electrical connector.
12. Disconnect the fuel pressure sensor electrical connector. 13. Disconnect the LH heated oxygen sensor (HO2S) electrical connector. Klj . 3 ba
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14. Disconnect the 16-
pin electrical connector on the back of the left cylinder head.
15. Remove the wiring harness: zSeparate the wiring harness from the fuel supply manifold.
16. To install, reverse the removal procedure. Klj . 4 ba
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REMOVAL AND INSTALLATION
Supply Manifold
Removal and Installation
WARNING: Do not smoke or carry lighted tobacco or open flame of any type when
working on or near any fuel related components. Highly flammable mixtures are always present
and may ignite. Failure to follow these instructions may result in personal injury.
WARNING: Fuel in the fuel system remains under high pressure even when the engine is
not running. Before working on or disconnecting any of the fuel lines or fuel system
components, the fuel system pressure must be relieved. Failure to follow these instructions
may result in personal injury.
1. Disconnect the battery ground cable.
2. Remove the upper intake manifold. For additional information, refer to Section 303 - 01A .
3. Relieve the fuel pressure. For additional information, refer to Section 310 - 00 .
4. Disconnect the fuel line. For additional information, refer to Section 310 - 00 .
5. Separate the wiring harness from the supply manifold.
6. NOTE: Right side shown, left side similar.
Disconnect the six fuel injector electrical connectors. 7. Disconnect the fuel pressure sensor. SECTION 303-
04A: Fuel Charging and Controls — 3.8L 2003 Mustang Workshop Manual Klj . 1 ba
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z
Disconnect the connector.
z Disconnect the vacuum hose.
8. NOTE: The right side is shown. The left side is similar.
Remove the four supply manifold bolts and remove the fuel supply manifold with the injectors.
9. NOTE: When the battery (10655) is disconnect and reconnected, some abnormal drive
symptoms may occur while the vehicle relearns its adaptive strategy. The vehicle may need to
be driven 16 km (10 mi) or more to relearn the strategy.
To install, reverse the removal procedure. Klj . 2 ba
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SPECIFICATIONS
SECTION 303-
04B: Fuel Charging and Controls — 4.6L (2V) 2003 Mustang Workshop Manual General Specifications
Item Specification
Lubricants and Chemicals
Super Premium SAE 10W-30, XO-
10W30-DSP WSS-
M2C153- G
Torque Specifications Description Nm lb-
ft lb-
in Throttle body bolts 10 — 89
Fuel injection supply manifold bolts 10 — 89
Fuel charging wiring 42 pin connector bolt 6 — 53
Battery supply wire nut 8 — 71
EGR pressure transducer bracket bolts 25 18 —
Generator battery supply nut 8 — 71 Klj . 1 ba
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DESCRIPTION AND OPERATION
Fuel Charging And Controls
The fuel injection supply manifold (9F792):
zdelivers fuel to the fuel injector.
z receives fuel from the fuel supply line.
The throttle body (9E926):
zcontrols air supply to the upper intake manifold (9424) by positioning the throttle plate.
z connects the accelerator cable (9A758) and the speed control actuator cable (9A825) (if
equipped) to the throttle lever.
z is not adjustable.
z cannot be cleaned.
The fuel injector (9F593):
zis electrically operated by the powertrain control module (PCM) (12A650).
z has an internal solenoid that opens a needle valve to inject fuel into the lower intake manifold.
z atomizes the fuel as the fuel is delivered.
z is deposit- resistant. Do not clean.
The fuel pressure relief valve (9H321):
zis used to inspect and relieve fuel pressure. Fuel Charging Wiring Connections SECTION 303-
04B: Fuel Charging and Controls — 4.6L (2V) 2003 Mustang Workshop Manual Klj . 1 ba
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