fuel pressure FORD MUSTANG 2003 User Guide

15. Connect the ignition coils and the fuel injectors.
16. Connect the fuel charging ground wire.
17. Connect the fuel pressure sensor electrical connector and the vacuum hose.
18. Install the throttle body and adapter as an assembly. Klj . 14 ba
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14. Disconnect the vacuum line from the fuel pressure sensor. Item Part Number Description
1 — To crankshaft position sensor
2 — To A/C compressor
3 — To radio ignition interference capacitor (2)
4 — To fuel injectors (8)
5 — To ignition coils (8)
6 — To engine coolant temperature sensor
7 — To throttle position sensor
8 — To idle air control valve
9 — To EGR vacuum regulator
10 — To differential pressure feedback EGR
11 — To fuel pressure regulator
12 — Fuel injection ground
13 — To generator
14 — To camshaft position sensor
15 — To body
16 — To heated oxygen sensor (2)
17 — Engine bulkhead connector
18 — To low coolant sensor
19 — To body
20 — To power distribution box
21 — To body Klj . 5 ba
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16. Disconnect the vacuum line to the fuel pressure sensor. Item Part Number Description
1 — To crankshaft position sensor
2 — To A/C compressor
3 — To radio ignition interference capacitor (2)
4 — To fuel injectors (8)
5 — To ignition coils (8)
6 — To engine coolant temperature sensor
7 — To throttle position sensor
8 — To idle air control valve
9 — To EGR vacuum regulator
10 — To differential pressure feedback EGR
11 — To fuel pressure regulator
12 — Fuel injection ground
13 — To generator
14 — To camshaft position sensor
15 — To body
16 — To heated oxygen sensor (2)
17 — Engine bulkhead connector
18 — To low coolant sensor
19 — To body
20 — To power distribution box
21 — To body Klj . 6 ba
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86. Position the throttle body and install the bolts, tighten in the sequence shown.
87. Connect the vacuum line to the fuel pressure sensor.
88. Connect the PCV hose.
89. Connect the PCV hose to the base of the throttle body. Klj . 31 ba
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96. Install the RH and LH special tools.
97. Using the special tool, remove the engine from the stand.
98. Using the special tool, install the crankshaft rear main seal.
zLubricate the oil seal using clean engine oil. 5 — To ignition coils (8)
6 — To engine coolant temperature sensor
7 — To throttle position sensor
8 — To idle air control valve
9 — To EGR vacuum regulator
10 — To differential pressure feedback EGR
11 — To fuel pressure regulator
12 — Fuel injection ground
13 — To generator
14 — To camshaft position sensor
15 — To body
16 — To heated oxygen sensor (2)
17 — Engine bulkhead connector
18 — To low coolant sensor
19 — To body
20 — To power distribution box
21 — To body Klj . 34 ba
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61. Connect the vacuum line to the fuel pressure sensor.
62. Install the positive crankcase ventilation (PCV) valve and hose as an assembly.
63. Connect the PCV hose to the base of the throttle body.
64. Connect the EGR tube to the EGR valve. Klj . 21 ba
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69. Install the engine control sensor wiring.
Item Part Number Description
1 — To crankshaft position sensor
2 — To A/C compressor
3 — To radio ignition interference capacitor (2)
4 — To fuel injectors (8)
5 — To ignition coils (8)
6 — To engine coolant temperature sensor
7 — To throttle position sensor
8 — To idle air control valve
9 — To EGR vacuum regulator
10 — To differential pressure feedback EGR
11 — To fuel pressure regulator
12 — Fuel injection ground
13 — To generator
14 — To camshaft position sensor Klj . 23 ba
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z
are positioned so that their tips direct fuel just ahead of the engine intake valves.
z are connected in series with the fuel pressure sensor.
z supply fuel from the fuel tank with a fuel pump mounted in the fuel tank.
A constant fuel pressure drop is maintained across the fuel injectors by the fuel pressure sensor. The
fuel pressure sensor:
zis positioned upstream from the fuel injectors on the fuel injection supply manifold.
Valve Train
The valve train operates as follows:
zball- tip hydraulic lash adjusters provide automatic lash adjustment.
z roller followers ride on the camshaft lobes, transferring the up-and- down motion of the
camshafts to the valves in the cylinder heads.
Positive Crankcase Ventilation System
All engines are equipped with a closed- type positive crankcase ventilation system recycling the
crankcase vapors to the upper intake manifold.
Lubrication System
The engine lubrication system operates as follows:
zoil is drawn into the oil pump through the oil pump screen cover and tube in the sump of the oil
pan.
z oil is pumped through the oil bypass filter on the left front side of the cylinder block.
z oil enters the main oil gallery where it is distributed to the crankshaft main journals and to both
cylinder heads.
z From the main journals, the oil is routed through cross- drilled passages in the crankshaft to
lubricate the connecting rod bearings. Controlled leakage through the crankshaft main bearings
and connecting rod bearings is slung radially outward to cool and lubricate the cylinder walls as
well as the entire connecting rod, piston and piston rings assembly.
z The left cylinder head is fed from a drilling into the supply passage feeding the main gallery at
the front of the cylinder block. The right cylinder head is fed from a drilling into the rear of the
main gallery. Main gallery pressure is reduced as it enters the cylinder head galleries through
fixed serviceable orifices located at the upper part of the feed passages. It is this reduced
pressure in the cylinder head galleries which feeds the camshaft journals, the hydraulic lash
adjusters and the primary and secondary timing chain tensioners.
z The camshaft lobe and roller followers are lubricated by splash created through valve train
operation.
Oil Pump
The lubrication system of the 4.6L (4V) engine is designed to provide optimum oil flow to critical
components of the engine through its entire operating range. The heart of the system is a positive
displacement internal gear oil pump using top seal rotors. Generically this design is known as a gerotor
pump, which operates as follows.
zThe oil pump is mounted on the front face of the cylinder block. Klj . 2 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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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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