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DIAGNOSIS AND TESTING
Engine
Refer to
Section 303 - 00 for basic mechanical concerns or refer to the Powertrain Control/Emissions
Diagnosis (PC/ED) manual for driveability concerns. SECTION 303-
01C: Engine — Cobra 4.6L (4V) 2003 Mustang Workshop Manual Klj . 1 ba
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IN-
VEHICLE REPAIR
Lower Intake Manifold
Removal and Installation 1. Drain the engine coolant. For additional information, refer to Section 303 - 03A in this section.
2. Drain the supercharger coolant. For additional information, refer to Section 303 - 03B .
3. Release the fuel system pressure. For additional information, refer to Section 310 - 00 .
4. Disconnect the radiator upper hose, radiator lower hose and the supercharger degas hose.
5. Remove the supercharger belt. For additional information, refer to Section 303 - 05 .
6. Disconnect the coolant hose.
SECTION 303-
01C: Engine — Cobra 4.6L (4V) 2003 Mustang Workshop Manual Material
Item Specification
Motorcraft Premium Engine
Coolant
VC
-4-A (in Oregon VC- 5, in
Canada CXC- 10) (green color) ESE-
M97B44-
A Motorcraft Premium Gold
Engine Coolant
VC
-7-A (in Oregon VC-7- B)
(yellow color) WSS-
M97B51-
A1 Klj . 1 ba
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7. Remove the air cleaner outlet tube. For additional information, refer to
Section 303 - 12 .
8. Disconnect the throttle position (TP) sensor and the idle air control (IAC) valve electrical connectors.
9. Disconnect the vacuum hose.
10. Disconnect the fuel hose spring lock coupling. For additional information, refer to Section 310 -
00 .
11. Disconnect the accelerator controls. zDisconnect the accelerator cable.
z If equipped, disconnect the speed control cable. 12. Remove the accelerator cable bracket bolts. Klj . 2 ba
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13. Release the clip and position the accelerator cable bracket and the cables aside.
14. Disconnect the electrical connectors from the fuel pulse damper, exhaust gas recirculation
(EGR) vacuum regulator solenoid, supercharger bypass vacuum solenoid, and the differential
pressure feedback EGR system.
15. Disconnect the vacuum hoses from the differential pressure feedback EGR system.
16. Disconnect the vacuum hoses from the supercharger bypass vacuum solenoid and the actuator. Klj . 3 ba
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17. Disconnect the vacuum hoses from the fuel pulse damper and the EGR vacuum regulator
solenoid.
18. Disconnect the vacuum hose from the EGR valve.
19. Disconnect the vacuum hoses at the back of the supercharger and position the vacuum harness aside.
20. Remove the vacuum accessory bracket mounting nut. Klj . 4 ba
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21. Remove the mounting bolts and the vacuum accessory bracket.
22. Disconnect the exhaust manifold to EGR valve tube.
23. Disconnect the barometric pressure (BARO) sensor electrical connector.
24. Disconnect the positive crankcase ventilation hose. Klj . 5 ba
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25. Separate the fuel charging wiring harness from the fuel injection supply manifold in four places
and position the harness aside.
26. Remove the ten bolts and the intake manifold, and the supercharger and fuel supply manifold as an assembly.
27. NOTE: Inspect the intake manifold gaskets and install new gaskets, if necessary.
NOTE: Install new bypass tube O- rings and lubricate them, using premium engine coolant.
To install, reverse the removal procedure. zTighten the intake manifold bolts in the sequence shown. Klj . 6 ba
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28. Fill and bleed the engine cooling system. For additional information, refer to
Section 303 - 03A in
this section.
29. Fill and bleed the supercharger cooling system. For additional information, refer to Section 303 -
03B . Klj . 7 ba
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