2003 FORD MUSTANG wiring

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
42003 Mustang Workshop Manual
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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
32003 Mustang Workshop Manual
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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
12003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_4464/S3B~us~en~ ...

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
32003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_4464/S3B~us~en~ ...

Item Part
Number Description
1 — Engine control sensor wiring —
42 pin electrical
connector 2 — RH heated oxygen sensor (HO2S) electrical
connector
3 — LH heated oxygen sensor (HO2S) electrical
connector
4 — Ground wire electrical connector
5 — LH ignition coil electrical connectors
6 — Fuel pressure sensor electrical connector
7 — Fuel temperature sensor electrical connector
8 — Power distribution box battery feed electrical wire
9 — 2 pin electrical connector
10 — 4 pin electrical connector
11 — Camshaft position sensor (CMP) electrical
connector Klj . 2 ba
32003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_4464/S3B~us~en~ ...

REMOVAL AND INSTALLATION
Fuel Charging Wiring Harness
Removal
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 be ignited. Failure to follow these instructions may result in personal injury.
1. Disconnect the battery ground cable (14301). For additional information, refer to Section 414 -
01 .
2. Disconnect the air cleaner outlet tube. For additional information, refer to Section 303 - 12 .
3. Disconnect the 42 pin connector.
4. Separate the wiring harness retainers from the dash panel.
5. Disconnect the following connectors: zThrottle position (TP) sensor
z Idle air control (IAC) valve
SECTION 303-
04B: Fuel Charging and Controls — 4.6L (2V) 2003 Mustang Workshop Manual Klj . 1 ba
142003 Mustang Workshop Manual
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14. Lower the vehicle.
15. Disconnect the coolant reservoir electrical connector.
16. Disconnect the following connectors:
zCamshaft position (CMP) sensor
z LH radio ignition interference capacitor
17. Separate the wiring harness from the power steering reservoir bracket. Klj . 4 ba
142003 Mustang Workshop Manual
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26. Disconnect the vacuum lines
27. Squeeze the two locking tabs, and remove the accelerator cable and the speed control cable (if
equipped) from the bracket and position aside.
28. Separate the fuel charging wiring (9D930) from the rear of the intake manifold (9424) and remove from the vehicle.
Installation 1. Position the fuel charging wiring in the vehicle and attach to the rear of the intake manifold. Klj . 7 ba
142003 Mustang Workshop Manual
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