fuel pressure FORD MUSTANG 2003 Service Manual

12 — Coolant reservoir bottle electrical connector
13 — Radio ignition interference capacitor electrical
connector
14 — Fuel injector electrical connectors
15 — Exhaust vacuum regulator (EVR) electrical
connector
16 — Differential pressure feedback EGR electrical
connector
17 — RH ignition coil electrical connectors
18 — Ignition coil electrical connectors
19 — Throttle position (TP) sensor electrical connector
20 — Idle air control (IAC) solenoid electrical connector
21 — Voltage regulator electrical connector
22 — Engine coolant temperature (ECT) electrical
connector
23 — Generator battery electrical connector
24 — Radio ignition interference capacitor electrical
connector
25 — Crankshaft position (CKP) sensor electrical
connector
26 — Air conditioning compressor clutch electrical
connector
27 — 16 pin electrical connector Klj . 3 ba
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REMOVAL AND INSTALLATION
Fuel Injectors
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.
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. Relieve the fuel pressure. For additional information, refer to Section 310 - 00 .
2. Remove the supply manifold. For additional information, refer to Fuel Injection Supply Manifold in this section.
3. Remove the fuel injectors from the supply manifold.
Installation 1. NOTE: Lubricate the new O- rings with Super Premium SAE 10W-30, XO-10W30- DSP or
equivalent meeting Ford specification WSS- M2C153-G, to aid installation.
Inspect the two O- rings on each fuel injector. Install new O- rings if necessary.
2. Install the fuel injectors onto the supply manifold.
SECTION 303-
04B: Fuel Charging and Controls — 4.6L (2V) 2003 Mustang Workshop Manual Klj . 1 ba
22003 Mustang Workshop Manual
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18. Disconnect the generator connectors:
zBattery power supply wire
z Voltage regulator
19. Disconnect the following connectors: zLH fuel injectors
z LH ignition coils
20. Disconnect the following connectors: zExhaust vacuum regulator (EVR)
z Ground wire
21. Disconnect the EGR pressure transducer electrical connector. Klj . 5 ba
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22. Disconnect the fuel pressure sensor electrical connector and the vacuum hose.
23. Slide cover up and remove the nut and the power distribution box battery supply wire.
24.
NOTE: These two connectors are located under the power distribution box.
Disconnect the two connectors.
25. Disconnect the main vacuum hose. Klj . 6 ba
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6. Install the battery supply wire, tighten the nut and close the cover.
7. Connect the fuel pressure sensor and the vacuum hose.
8. Connect the EGR pressure transducer electrical connector.
9. Connect the following connectors:
zGround wire
z Exhaust vacuum regulator (EVR) Klj . 9 ba
142003 Mustang Workshop Manual
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REMOVAL AND INSTALLATION
Fuel Injection Supply Manifold
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.
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. 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. 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. Remove the throttle body (9E926). For additional information, refer to Throttle Body in this
section.
6. Remove the idle air control (IAC) hose and position it out of the way.
7. Remove the positive crankshaft ventilation (PCV) hose.
SECTION 303-
04B: Fuel Charging and Controls — 4.6L (2V) 2003 Mustang Workshop Manual Klj . 1 ba
82003 Mustang Workshop Manual
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8. Disconnect the four RH fuel injector electrical connectors.
9. Disconnect the IAC electrical connector and the main chassis vacuum hose.
10. Remove the hose.
11. Squeeze the two locking tabs, and remove the accelerator cable and the speed control cable (if equipped) and position aside.
12. Disconnect the fuel pressure sensor electrical connector and the vacuum hose. Klj . 2 ba
82003 Mustang Workshop Manual
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13. Disconnect the ground wire.
14. Disconnect the LH fuel injector electrical connectors.
15. Remove the exhaust vacuum regulator (EVR) solenoid vacuum lines.
16. Remove the bolts from the EGR pressure transducer bracket and position aside. Klj . 3 ba
82003 Mustang Workshop Manual
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8. Connect the fuel pressure sensor electrical connector and the vacuum hose.
9.
NOTE: Make sure the locking clips are fully engaged into the bracket.
Reposition the accelerator cable and the speed control cable (if equipped) and install the cables
into the bracket.
10. Connect the hose.
11. Connect the IAC electrical connector and install the main chassis vacuum hose. Klj . 6 ba
82003 Mustang Workshop Manual
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DESCRIPTION AND OPERATION
Fuel Charging and Controls
The fuel injection supply manifold:
zreceives fuel from the fuel supply line.
z delivers fuel to the fuel injector.
The throttle body:
zcontrols air supply to the intake manifold by positioning the throttle plate.
z connects the accelerator cable and, if equipped, the speed control actuator cable to the throttle
lever.
z is not adjustable.
z cannot be cleaned.
The fuel injector:
zis electrically operated by the powertrain control module (PCM).
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:
zis used to inspect and relieve fuel pressure.
SECTION 303-
04C: Fuel Charging and Controls — Cobra 4.6L (4V) 2003 Mustang Workshop Manual Klj . 1 ba
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