pcv hose FORD MUSTANG 2003 Owner's Manual

6. Disconnect the ignition coil electrical connectors.
7. Remove the ignition coils.
8. Remove the bolt and position the oil level indicator tube aside.
9. Remove the positive crankcase ventilation (PCV) valve hose and disconnect the electrical
connector. Klj . 2 ba
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28. Connect the degas bottle return hose.
29. Connect the degas bottle vent hose.
30. Connect the wiring harness anchor to the valve cover.
31. Install the positive crankcase ventilation (PCV) valve hose and connect the electrical connector. Klj . 18 ba
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76. Connect the EGR tube to the EGR valve.
77. Install the PCV valve hose and connect the electical connector.
78. Connect the PCV valve tube to the upper intake manifold.
79. Install the special tool. Klj . 26 ba
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6. Disconnect the following connections:
zFour ignition coils
z Four fuel injectors
z Positive crankcase ventilation (PCV) hose from valve cover.
7. Disconnect the following connectors: zRH radio ignition interference capacitor
z Engine coolant temperature (ECT) sensor 8. Disconnect the 16 pin connector Klj . 2 ba
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20. Lower the vehicle.
21. Connect the 16 pin connector.
22. Connect the following connectors:
zECT sensor
z RH radio ignition interference capacitor
23. Connect the following connectors: zPCV hose
z Four fuel injectors
z Four ignition coils Klj . 12 ba
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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
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12. Connect the four RH fuel injector electrical connectors.
13. Connect the PCV hose.
14. Position the IAC hose and connect the hose.
15. Install the throttle body.
16. Connect the fuel line. Klj . 7 ba
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6. Remove the PCV valve.
7. Disconnect and remove the PCV hose.
8. Disconnect the camshaft position (CMP) sensor electrical connector.
9. Disconnect the engine coolant temperature (ECT) sensor electrical connector and unclip the
harness from the stud. Klj . 2 ba
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DESCRIPTION AND OPERATION
Engine Emission Control
CAUTION: Do not remove any part of the engine emission control system. Operating the
engine without the engine emission control system will reduce fuel economy and engine
ventilation. This will weaken engine performance and shorten engine life.
The engine emission control consists of the:
zpositive crankcase ventilation (PCV) system.
z exhaust gas recirculation (EGR) system.
Typical Vehicle Emission Control Information (VECI) Decal
The Vehicle Emission Control Information (VECI) decal shows:
zthe components of the emission control system.
z the correct vacuum hose routing.
SECTION 303-
08: Engine Emission Control 2003 Mustang Workshop Manual Item Part Number Description
1 — Adjustment procedure notes
2 — Ignition timing specification
3 — Engine vacuum hose routing (typical)
4 — Spark plug gap specification
5 — Engine type Klj . 1 ba
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z
the color stripe of the vacuum hoses.
The PCV system uses the intake manifold vacuum to ventilate the crankcase and return the fumes to
the intake manifold for combustion.
EGR System Components
The EGR system returns a portion of the exhaust gas to the intake manifold to reduce the combustion
temperature. This results in lower nitrous oxide formation.
The powertrain control module (PCM) controls the EGR vacuum regulator solenoid . The EGR vacuum
regulator solenoid controls the vacuum to the EGR valve. When the EGR valve opens, exhaust gas
flows to the intake manifold. The EGR transducer measures the flow through the EGR valve to exhaust
manifold tube and sends a signal to the powertrain control module. A metering orifice in the EGR valve
to exhaust manifold tube restricts the flow rate when the EGR valve is open.
The PCV valve:
zcontrols the amount of ventilating air and blow- by gases going to the intake manifold.
z prevents a backfire from reaching the crankcase.
The EGR valve to exhaust manifold tube:
zconnects the exhaust manifold to the EGR valve.
z has two tubes connecting to the EGR transducer for EGR flow monitoring.
The EGR transducer:
zmonitors the EGR flow rate through the EGR valve to exhaust manifold tube.
z sends an EGR flow rate signal to the powertrain control module.
The EGR vacuum regulator solenoid uses input from the powertrain control module to change the
EGR valve operation. Item Part Number Description
1 12A65 Powertrain control module
2 9J459 EGR vacuum regulator solenoid
3 9D475 EGR valve
4 9J433 EGR transducer
5 — Metering orifice
6 9D477 EGR valve to exhaust manifold tube Klj . 2 ba
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