2003 FORD MUSTANG open hood

glass
zAir traveling up
windshield molding
along A- pillar. z
INSTALL foam rope the
full length of the A- pillar.
z Windshield/backlite
misaligned or not
installed correctly. z
REINSTALL the
windshield/backlite.
z Rear hood seal at base
of windshield
misaligned/damaged. z
REALIGN or INSTALL a
new seal as necessary.
z Air leak at cowl zCowl gasket
misaligned/damaged. z
REALIGN or INSTALL a
new seal as necessary.
z Air leak around
liftgate perimeter z
Loose fit seal. zPINCH the seal carrier to
improve retention on the
seal flange or INSERT
foam in the carrier.
z Seal misaligned. zREINSTALL the seal.
z Liftgate misaligned. zREALIGN the liftgate.
CHECK the liftgate fit in
the body opening and
ADJUST as necessary.
z Scuff plate misaligned. zREINSTALL the scuff
plate.
z Seal or seal push pins
damaged. z
INSTALL a new seal.
z Air leak around
the liftgate flip
window
perimeter z
Loose fit seal. zPINCH the seal carrier to
improve the retention to
the seal flange.
z Seal misaligned. zREINSTALL the seal.
z Glass misaligned. zREALIGN the glass.
z Seal damaged. zINSTALL a new seal.
z Wind noise from
antenna z
Shape of antenna. zINSTALL an antenna boot
or a spiral antenna.
z Air leak around
antenna cable access
hole. z
INSPECT the antenna
access hole grommet.
REPAIR as necessary.
z Air leak from
closed roof
opening panel z
Seal installed
incorrectly. z
REINSTALL the seal.
z Roof opening panel
glass/door misaligned. z
REALIGN the roof
opening panel glass/door.
z Roof opening panel
damaged. z
INSTALL a new roof
opening panel.
z Buffeting from an
open roof
opening panel z
Wind deflector
inoperative/damaged. z
REPAIR or INSTALL a
new wind deflector as
necessary.
z Wind deflector height
incorrect. z
ADJUST the wind
deflector higher.
z Wind noise
created by
airflow over or
behind body
panels z
Fender splash shield
misaligned. z
REALIGN the fender
splash shield. Klj . 14 ba
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z
Body panel misaligned
(exposed edge). z
REALIGN the appropriate
body panel.
z Hood misaligned (front
margin). z
CHECK hood gaps and fit.
ADJUST the hood as
necessary.
z Front grille edge noise. zAPPLY foam in the hollow
areas behind the louvers.
z Wind noise
created by grille
opening panel z
Grille relationship to
leading edge on hood. z
ADJUST the grille
opening panel forward to
eliminate wind noise.
z Sharp edges due to
material imperfections. z
REMOVE the sharp
edges (no damage to
visible surface).
z Wind noise from
air extractor z
Air extractor housing
seated incorrectly. z
REINSTALL the air
extractor housing.
z Air extractor housing or
flaps damaged. z
INSTALL a new air
extractor.
z Air leak at top of
A-pillar —
vehicles with a
convertible top z
Seal at windshield
header installed
incorrectly. z
REINSTALL the seal.
z Seal pinched. zFILL the seal with foam to
reshape it.
z Gap between side rail
and header seal at A-
pillar. z
ADJUST the J-hook/vinyl
top.
z Air leak at rear
quarter glass
(division bar) —
vehicles with a
convertible top z
No contact between
front side glass and
quarter glass division
bar. z
ADJUST the front side
glass regulator and the
rear quarter glass
regulator.
z Air leak or wind
noise from top of
side glass —
vehicles with a
convertible top z
Gap between side rail
and vinyl top. z
ADD additional foam tape
to seal between the side
rail and the vinyl top.
z Seal at windshield
header installed
incorrectly. z
REINSTALL the seal.
z Seal damaged
between side rail and
vinyl top. z
INSTALL a new seal.
z Vinyl top damaged. zINSPECT the vinyl top.
INSTALL a new vinyl top
as necessary.
z Air leak or wind
noise at
windshield
header —
vehicles with a
convertible top z
Vinyl top not flush with
header. z
ADJUST the J-hook to
lower the top to achieve a
flush condition.
z Seal at windshield
header installed
incorrectly. z
REINSTALL the seal.
z Header seal not flush zREINSTALL the seal. Klj . 15 ba
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(+40°F) or colder at
first start of the day
between ball
bearings and
bearing race.
z Power steering moan
— occurs at high idle
and possibly at idle
during the first cold
start of the day in
temperatures of
approximately - 18°C
(0°F) or colder. Noise
can even be a severe
screech for less than
one minute in very
cold temperatures of
approximately - 29°C
(- 20°F) or colder z
High fluid
viscosity, or
plugged
reservoir screen
in power
steering
reservoir
starves pump
causing
cavitation. z
Go To Pinpoint Test D .
z Generator whine —
during high electrical
loads at idle or high
idle, a high pitch
whine or moan is
emitted from the
generator z
Generator
electrical field
noise. z
Using an EngineEAR,
PROBE near the generator
housing. LISTEN for
changes in the noise level
while changing electrical
loads (such as rear defrost,
headlamps, etc.). CARRY
OUT a generator load test. If
the system passes the load
test, the noise is from the
generator bearings,
INSTALL new bearings. If
the system fails the load
test, INSTALL a new
generator. REFER to
Section 414 - 02 .
z Engine- driven cooling
fan moan — occurs
during the first start of
the day. It is most
objectionable near
idle speeds up to
2000 rpm. The noise
increases with rpm z
The viscous
cooling fan
clutch engages
until the fluid in
the clutch
reaches normal
operating
temperature,
causing the fan
to fully engage. z
Go To Pinpoint Test E .
z Drumming noise —
occurs inside the
vehicle during idle or
high idle, hot or cold.
Very low- frequency
drumming is very rpm
dependent z
Exhaust system
vibration excites
the body
resonances
inducing interior
noise.
z Engine vibration
excites the
body
resonances
inducing interior
noise. z
Go To Pinpoint Test F .
z Hissing noise —
occurs during idle or
high idle that is
apparent with the
hood open z
Vacuum leak or
idle air control
(IAC) valve flow
noise. z
Use the Ultrasonic Leak
Detector/EngineEAR to
locate the source. Scan the
air intake system from the
inlet to each cylinder intake Klj . 29 ba
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Component Tests
Idle Air Control (IAC) Valve
1. Open the hood.
2. NOTE: Key symptom is elevated idle speed while noise is occurring.
NOTE: "Snapping" the throttle can induce the noise.
Verify the condition by operating the vehicle for a short time.
3. Inspect the IAC valve. If physical evidence of contamination exists, install a new IAC valve. GO to
M4 .
M4 INSPECT THE FRONT DRIVESHAFT
z
NOTE: Verify that the driveshaft and pinion flange index marks
are aligned.
z Inspect the front driveshaft for missing weights, damage or
undercoating.
z Inspect the U- joints and slip yoke for freedom of movement.
z Check driveshaft runout and, if necessary, check the pinion
flange runout.
z Is the driveshaft or U- joints worn or damaged? Yes
REPAIR or INSTALL a
new driveshaft as
necessary. TEST the
system for normal
operation.
No
GO to
M5 .
M5 ROAD TEST WITH THE FRONT DRIVESHAFT ONLY
z
NOTE: Index mark the driveshaft to the pinion flange and to the
output shaft before removal.
z Remove the rear driveshaft.
z Plug the transfer case with an output shaft seal plug.
z NOTE: Shift the transfer case into 4WD high so the vehicle is
driven by the front driveshaft only.
z Test drive the vehicle.
z Is the vibration gone? Yes
INSTALL and BALANCE
the rear driveshaft.
TEST the system for
normal operation.
No
GO to
M6 .
M6 ROAD TEST WITH THE REAR DRIVESHAFT ONLY
z
NOTE: Index mark the front driveshaft to the pinion flange.
z Remove the front driveshaft.
z Test drive the vehicle.
z Is the vibration gone? Yes
INSTALL and BALANCE
the front driveshaft.
TEST the system for
normal operation.
No
GO to
M7 .
M7 TRANSFER CASE TAIL SHAFT INSPECTION
z
Inspect the splines of the output shaft for wear or damage.
z Inspect the splines of the driveshaft slip yoke for wear or
damage.
z Are the splines worn or damaged? Yes
REPAIR or INSTALL
new components as
necessary. TEST the
system for normal
operation.
No
The transfer case is OK.
CONDUCT a diagnosis
on other suspect
systems. Klj . 63 ba
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GENERAL PROCEDURES
Sprockets
1. WARNING: To avoid the possibility of personal injury or damage to the vehicle, do
not operate the engine with the hood open until the fan blade has been examined for
possible cracks and separation.
NOTE: Specifications show the expected minimum or maximum condition. Refer to the
appropriate section in Group 303 for the procedure.
NOTE: If a component fails to meet the specifications, it is necessary to install a new
component or refinish. If the component can be refinished, wear limits are provided as an aid to
making a decision. A new component must be installed for any component that fails to meet
specifications and cannot be refinished.
Inspect the timing chain/belt and the sprockets.
zInstall new components as necessary. Refer to the appropriate section in Group 303 for
the procedure.
SECTION 303-
00: Engine System — General Information 2003 Mustang Workshop Manual Klj . 1 ba
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REMOVAL
Engine
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, resulting in possible personal injury.
All vehicles
1. Drain the engine cooling system. For additional information, refer to Section 303 - 03A .
2. Recover the A/C refrigerant. For additional information, refer to Section 412 - 00 .
3. Disconnect the battery negative cable (14301). For additional information, refer to Section 414 -
01 .
4. Relieve the fuel pressure. For additional information, refer to Section 310 - 00 .
5. Disconnect the hood ground strap. SECTION 303-
01A: Engine — 3.8L 2003 Mustang Workshop Manual Special Tool(s)
Lifting Bracket Set, Engine
303-
D095 (D94L-6001- A) or
equivalent Spreader Bar
303-
D089 (D93P-6001- A3) or
equivalent Heavy Duty Floor Crane
014-
00071 or equivalent Klj . 1 ba
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DESCRIPTION AND OPERATION
Engine
WARNING: Do not operate the engine with the hood open until the fan blade has been first
examined for possible cracks and separation.
The 4.6L (4V) (281 CID) Cobra engine is a V- 8 with the following features:
z intercooled supercharger
z dual overhead camshafts
z four valves per cylinder
z sequential multiport fuel injection (SFI)
z an aluminum intake manifold
z aluminum cylinder heads
z a cast aluminum, 90-degree V- cylinder block
z individually chain- driven camshafts with a hydraulic timing chain tensioner on each timing chain
z the electronic ignition system with eight ignition coils
Identification
Always refer to these labels when replacement parts are necessary or when checking engine
calibrations. The engine parts often differ within a CID family. Verification of the identification codes will
ensure that the correct parts are obtained. These codes contain all the pertinent information relating to
the dates, optional equipment and revisions. The Ford Master Parts Catalog contains a complete
listing of the codes and their application.
Code Information
The engine code information label, located on the side of the valve cover and the front side of the
valve cover, contains the following:
zengine build date
z engine plant code
z engine code
Exhaust Emission Control System
Operation and necessary maintenance of the exhaust emission control devices used on this engine is
covered in the Powertrain Control/Emissions Diagnosis (PC/ED) manual.
Induction System
The sequential multiport fuel injection (SFI) provides the fuel/air mixture needed for combustion in the
cylinders. The eight solenoid- operated fuel injectors:
z are mounted in the lower intake manifold.
z meter fuel into the air intake stream in accordance with engine demand.
SECTION 303-
01C: Engine — Cobra 4.6L (4V) 2003 Mustang Workshop Manual Klj . 1 ba
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DESCRIPTION AND OPERATION
Engine
WARNING: Do not operate the engine with the hood open until the fan blade has been first
examined for possible cracks and separation.
The 4.6L (4V) (281 CID) is a V- 8 engine with the following features:
z dual overhead camshafts
z four valves per cylinder
z sequential multiport fuel injection (SFI)
z an aluminum intake manifold
z aluminum cylinder heads
z a cast aluminum, 90-degree V- cylinder block
z individually chain- driven camshafts with a hydraulic timing chain tensioner on each timing chain
z the electronic ignition system with eight ignition coils
Identification
Always refer to these labels when replacement parts are necessary or when checking engine
calibrations. The engine parts often differ within a CID family. Verification of the identification codes will
ensure that the correct parts are obtained. These codes contain all the pertinent information relating to
the dates, optional equipment and revisions. The Ford Master Parts Catalog contains a complete
listing of the codes and their application.
Code Information
The engine code information label, located on the side of the valve cover and the front side of the
valve cover, contains the following:
zengine build date
z engine plant code
z engine code
Exhaust Emission Control System
Operation and necessary maintenance of the exhaust emission control devices used on this engine is
covered in the Powertrain Control/Emissions Diagnosis (PC/ED) manual.
Induction System
The sequential multiport fuel injection (SFI) provides the fuel/air mixture needed for combustion in the
cylinders. The eight solenoid- operated fuel injectors:
z are mounted in the lower intake manifold.
z meter fuel into the air intake stream in accordance with engine demand.
z are positioned so that their tips direct fuel just ahead of the engine intake valves.
SECTION 303-
01D: Engine — Mach I 4.6L (4V) 2003 Mustang Workshop Manual Klj . 1 ba
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