2003 FORD MUSTANG oil

REMOVAL AND INSTALLATION
Spark Plug
Removal
1. Remove the ignition coil on plug. For additional information, refer to Ignition Coil — Coil On Plug
in this section.
2. NOTE: Use compressed air to remove any foreign material from the spark plug well before
removing the spark plugs (12405).
NOTE: If an original spark plug is used, make sure it is installed in the same cylinder from which
it was taken. New spark plugs can used in any cylinder.
NOTE: One spark plug is shown; others are similar.
Remove the spark plugs
3. Inspect for gap bridged. zThis can be identified by a deposit build up closing the gap between electrodes.
z This can be caused by oil or carbon fouling.
z Clean the spark plug.
4. Inspect for oil fouling. zThis can be identified by wet black deposits on the insulator shell bore electrodes.
z This can be caused by excessive oil entering the combustion chamber through worn
rings and pistons, excessive clearance between valve guides and stems, or worn or
loose bearings. Correct the oil problem.
SECTION 303-
07B: Engine Ignition — 4.6L (2V) 2003 Mustang Workshop Manual Klj . 1 ba
42003 Mustang Workshop Manual
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SPECIFICATIONS
SECTION 303-
07C: Engine Ignition — 4.6L (4V) 2003 Mustang Workshop Manual General Specifications
Item Specification
Ignition timing 10 degrees BTDC ±
2 degrees non-adjustable Firing order 1-3-7-2-6-5-4-
8 Spark plug gap mm (in) 1.32-
1.42 (0.052- 0.056) Spark plug type AWSF-
32EM
Torque Specifications Description Nm lb-
ft lb-
in Spark plugs 15 11 —
Ignition coil cover bolts 10 — 89 Klj . 1 ba
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DESCRIPTION AND OPERATION
Engine Ignition
Eight separate ignition coils:
zare controlled by the powertrain control module (PCM).
z are mounted directly above each spark plug.
z are controlled by the powertrain control module for correct firing sequence.
The spark plug:
zchanges the high voltage pulse into a spark which ignites the fuel and air mixture.
z originally equipped on the vehicle has a platinum- enhanced active electrode for long life.
The crankshaft position (CKP) sensor:
NOTE: Initial engine ignition timing is set at 10 degrees ± 2 degrees before top dead center (BTDC)
and is not adjustable. For additional information, refer to the Powertrain Control/Emissions Diagnosis
(PC/ED) manual.
zis a variable reluctance sensor, triggered by a 36- minus-1 tooth trigger pulse wheel located on
the crankshaft, inside the engine front cover.
The sine wave type signal generated from the crankshaft position sensor provides two types of
information:
zposition of the crankshaft in 10 degree increments
z the crankshaft speed (rpm)
For additional information, refer to Section 303 - 14 .
SECTION 303-
07C: Engine Ignition — 4.6L (4V) 2003 Mustang Workshop Manual Klj . 1 ba
22003 Mustang Workshop Manual
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REMOVAL AND INSTALLATION
Ignition Coil-
On-Plug
Removal and Installation 1. Disconnect the battery ground cable. For additional information, refer to Section 414 - 01 .
2. Remove the air cleaner outlet pipe. For additional information, refer to Section 303 - 12 .
3. Remove the RH ignition coil cover bolts and the cover.
4. Remove the ignition coils. 1. Disconnect the electrical connectors.
2. Remove the ignition coils.
SECTION 303-
07C: Engine Ignition — 4.6L (4V) 2003 Mustang Workshop Manual Material
Item Specification
Silicone Brake Caliper Grease
and Dielectric Compound
D7AZ-
19A331-A or equivalent ESE-
M1C171-
A Klj . 1 ba
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5. Remove the LH ignition coil cover bolts and the cover.
6. Remove the ignition coils.
1. Disconnect the connectors.
2. Remove the ignition coils. Klj . 2 ba
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7.
NOTE: Verify that the ignition coil spring is correctly located inside the ignition coil boot and that
there is no damage to the tip of the boot.
To install, reverse the removal procedure.
zApply a light coat of dielectric grease to the inside of the ignition coil boots. Klj . 3 ba
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REMOVAL AND INSTALLATION
Spark Plugs
Removal and Installation
1. Remove the ignition coil- on-plug. For additional information, refer to Ignition Coil - On - Plug in this
section.
2. NOTE: Use compressed air to remove any foreign material from the spark plug well before
removing the spark plugs.
NOTE: If an original spark plug is used, make sure it is installed in the same cylinder from which
it was taken. New spark plugs can be used in any cylinder.
Remove the RH spark plugs.
3. Remove the LH spark plugs.
4. Inspect the spark plugs. Install new spark plugs as necessary. For additional information, refer to Section 303 - 00
5. Adjust the spark plug gap as necessary.
SECTION 303-
07C: Engine Ignition — 4.6L (4V) 2003 Mustang Workshop Manual Klj . 1 ba
22003 Mustang Workshop Manual
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DESCRIPTION AND OPERATION
Intake Air Distribution and Filtering —
Supercharger,
Charge Air Cooler
The supercharger (SC) is a positive displacement pump. Its purpose is to supply an excess volume of
intake air to the engine by increasing air pressure and density in the intake manifold. The supercharger
is matched to the engine by its displacement and belt ratio, and can provide excess airflow at any
engine speed.
NOTE: The supercharger is repaired only as an assembly. Disassembly of the supercharger unit may
void the warranty.
NOTE: The supercharger is not a bolt- on option. It is part of an integrated engine system. Many
components of the supercharged engine are not interchangeable with similar parts from a non-
supercharged engine.
The supercharger contains two three- lobed rotors. The helical shape and specialized porting provide a
smooth discharge flow and low level of noise during operation. The rotors are supported by ball
bearings in front and needle bearings at the rear. The drive gears are pressed into place, therefore the
supercharger is installed new as a unit, and is not repairable.
The supercharger system is a blow- through type with the fuel injected directly into the intake ports. The
supercharger is belt driven off the crankshaft through an idler pulley. The throttle body controls the
amount of intake air to the supercharger through the intake plenum. Air from the supercharger is
routed through the charge air cooler (CAC), then to the intake manifold. The resulting denser air
charge in the combustion chamber provides for a higher power output of the engine over a non-
supercharged engine of the same displacement.
NOTE: It is not possible to increase manifold pressure or engine power output by altering the bypass
valve or the actuator.
At partial- throttle opening or when vacuum is present in the intake system, a vacuum- controlled
bypass valve reroutes some discharged air from the supercharger back through the intake plenum.
This prevents the supercharger from cavitating, causing reduced performance, increased
temperatures, and poor fuel economy.
The supercharger has a self- contained oiling system that does not require a fluid change for the life of
the vehicle. However, at every 30,000 mile interval, the supercharger fluid level should be checked.
The vehicle should be parked on a level surface, the engine cool, and not running. To check the oil,
remove the Allen head plug located at the front of the supercharger. The oil level should be at the
bottom of the fill plug threads when cold. If the fluid level is low, add Synthetic Supercharger Fluid
E9SZ- 19577- A or equivalent meeting Ford specification ESE-M99C115–A
Supercharged vehicles are equipped with a charge air cooler (CAC). The CAC cools the pressurized
air from the supercharger, increasing the air density, which improves combustion efficiency, engine
horsepower and torque. SECTION 303-
12: Intake Air Distribution and Filtering 2003 Mustang Workshop Manual Klj . 1 ba
22003 Mustang Workshop Manual
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