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DIAGNOSIS AND TESTING
Engine
For basic mechanical concerns, refer to
Section 303 - 00 . Refer to the Powertrain Control/Emissions
Diagnosis (PC/ED) manual. SECTION 303-
01B: Engine — 4.6L (2V) 2003 Mustang Workshop Manual Klj . 1 ba
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IN-
VEHICLE REPAIR
Intake Manifold
Removal 1. Drain the engine cooling system. For additional information, refer to Section 303 - 03A or
Section 303 - 03B .
2. Remove the air cleaner outlet tube. For additional information, refer to Section 303 - 12 .
3. Disconnect the fuel line. For additional information, refer to Section 310 - 00 .
4. Disconnect the upper radiator hose from the water outlet connector.
5. Disconnect and remove the upper radiator hose.
6. Disconnect the accelerator cable, speed control actuator cable and return spring.
SECTION 303-
01B: Engine — 4.6L (2V) 2003 Mustang Workshop Manual Klj . 1 ba
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7. Remove the bolts and position the cables and bracket out of the way.
8. Remove the breather tube.
9. Disconnect the evaporative emissions return line.
10. Disconnect the differential pressure feedback EGR electrical connector.
11. Disconnect the hoses from the differential pressure feedback EGR transducer. Klj . 2 ba
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12. Disconnect the EGR vacuum regulator solenoid electrical connector.
13. Disconnect the EGR vacuum regulator solenoid vacuum supply.
14. Remove the bolts retaining the EGR vacuum regulator solenoid bracket to the intake manifold.
15. Disconnect the exhaust gas recirculation (EGR) tube from the EGR valve. Klj . 3 ba
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16. Disconnect the positive crankcase ventilation (PCV) hose from the base of the throttle body and
spacer assembly.
17. Disconnect the hose from the PCV valve.
18. Disconnect the vacuum hose from the EGR valve. 19. Disconnect the idle air control (IAC) valve electrical connector. Klj . 4 ba
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20. Disconnect the main vacuum supply from the base of the throttle body adapter.
21. Disconnect the throttle position sensor (TPS) electrical connector.
22. Remove the bolts.
23. Remove the throttle body and adapter as an assembly.
zInspect and clean the sealing surfaces.
„The gasket is reusable if not damaged. Klj . 5 ba
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24. Disconnect the fuel pressure sensor electrical connector and the vacuum hose.
25. Disconnect the fuel charging ground wire.
26. Disconnect the ignition coils and the fuel injectors.
27. Disconnect the climate control vacuum supply hoses and remove the vacuum harness. Klj . 6 ba
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28. Remove the four studs.
29. Remove the injectors and fuel injection supply manifold as an assembly.
30. Remove the ignition coils.
31. Disconnect the battery terminal. Klj . 7 ba
202003 Mustang Workshop Manual
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