2003 FORD MUSTANG height

Valve spring installed height 42.3-
42.9 mm (1.67- 1.69 in) Valve spring installed pressure 283.0-
321.0 N @ 42.56 mm (63.61 lb @ 1.68 in) Roller follower ratio —
intake 2.02:1
Roller follower ratio —
exhaust 2.03:1
Hydraulic Lash Adjuster
Diameter 16.000-
15.988 mm (0.6299- 0.6294 in) Clearance-
to-bore 0.018-
0.069 mm (0.0007- 0.0027 in) Service limit 15.988 mm
Hydraulic leakdown rate
c 5-
25 seconds Collapsed lash adjuster gap —
desired 0.45-
0.85 mm (0.02- 0.03 in) Camshaft
Theoretical valve lift @ 0 lash —
intake 13.00 mm (0.51 in)
Theoretical valve lift @ 0 lash —
exhaust 13.75 mm (0.54 in)
Lobe lift —
intake 7.11038 mm (0.28 in)
Lobe lift —
exhaust 7.4794 mm (0.30 in)
Allowable lobe lift loss 0 mm (0.0 in)
Journal diameter 26.962-
26.936 mm (1.0615- 1.0605 in) Camshaft journal bore inside diameter 27.012-
26.987 mm (1.0635- 1.0625 in) Camshaft journal-
to-bearing clearance 0.025-
0.076 mm (0.00098- 0.002992 in) Camshaft journal-
to-bearing clearance —
service limit 0.100 mm (0.003937 in) max.
Runout —
Front and rear journals 0.03 mm (0.001 in)
Runout —
four inner journals 0.09 mm (0.003 in)
End play 0.027-
0.190 mm (0.001- 0.007 in) End play —
service limit 0.190 mm (0.007480 in)
Cylinder Block
Cylinder bore diameter 31 mm (1.24 in) from top of block
red — 90.200-90.210
blue — 90.210-90.220
yellow — 90.220-90.230 Cylinder bore maximum taper 0.70 mm (0.027559 in)
Cylinder bore maximum out-of-
round —limit 0.20 mm (0.007874 in)
Cylinder bore maximum out-of-
round —service
limit 0.70 mm (0.027559 in)
Main bearing bore inside diameter 72.400-
72.424 mm (2.8504- 2.8513 in) Crankshaft
Main bearing journal diameter 67.482-
67.504 mm (2.66- 21.661 in) Main bearing journal maximum taper 0.004 mm (0.0002 in)
Main bearing journal maximum out-of-
round 0.05 mm (0.002 in)
Main bearing journal-
to-cylinder block clearance
— desired 0.025-
0.044 mm (0.001- 0.002 in) Main bearing journal-
to-cylinder block clearance
— allowable 0.025-
0.050 mm (0.00098- 0.00197 in) Connecting rod journal diameter 52.983-
53.003 mm (2.085941- 2.086728 in) Klj . 2 ba
62003 Mustang Workshop Manual
17. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_4464/S3B~us~en~ ...

Valve head diameter—
exhaust 30 mm (1.18 inch)
Valve face runout 0.05 mm (0.002 in)
Valve face angle 45.5 degrees
Valve seat width—
intake 1.8-
2.2 mm (0.071- 0.086 inch) Valve seat width—
exhaust 1.8-
2.2 mm (0.071- 0.086 inch) Valve seat runout 0.05 mm (0.002 inch)
Valve seat angle 45 degrees
Valve spring free length—
intake 42.16 mm (1.6598 inch)
Valve spring free length—
exhaust 42.16 mm (1.6598 inch)
Valve spring squareness 2 degrees
Valve spring compression pressure—
intake 711.47 N @ 26.19 mm (159.9 lb-
ft @
1.031 inch) Valve spring compression pressure—
exhaust 711.47 N @ 26.19 mm (159.9 lb-
ft @
1.031 inch) Valve spring installed height 36.14 mm (1.4228 in)
Valve spring installed pressure—
intake 289.1 N @ 36.14 mm (64.99 lb-
ft @
1.4228 inch) Valve spring installed pressure—
exhaust 289.1 N @ 36.14 mm (64.99 lb-
ft @
1.4228 inch) Roller follower ratio 1.8:1
Hydraulic Lash Adjuster
Diameter 16.000-
15.988 mm (0.6299- 0.6294 inch) Clearance-
to-bore 0.018-
0.069 mm (0.000709- 0.002717
inch) Service limit 0.016 mm (1.0006299 inch)
Hydraulic leakdown rate
c 5-
25 seconds Collapsed lash adjuster gap 0.80-
1.20 mm (0.0315- 0.0472 inch) Camshaft
Theoretical valve lift @ 0 lash—
intake (primary and
secondary) 10.0 mm (0.3937 inch)
Theoretical valve lift @ 0 lash—
exhaust 10.0 mm (0.3937 inch)
Lobe lift 5.54 mm (0.218 in)
Allowable lobe lift loss 0.130 mm (0.0051 in)
Journal diameter 26.962-
26.936 mm (1.0615- 1.0605 inch) Camshaft journal bore inside diameter 27.012-
26.987 mm (1.0635- 1.0625 in) Camshaft journal-
to bearing clearance 0.025-
0.076 mm (0.00098- 0.002992
inch) Runout 0.025 mm (0.0010 in)
End play 0.025-
0.165 mm (0.00098- 0.00649 inch) Cylinder Block
Cylinder bore diameter 90.2-
90.239 mm Cylinder bore maximum taper 0.016 mm
Cylinder bore maximum out-of-
round 0.016 mm
Main bearing bore diameter 72.402-
72.422 mm Klj . 2 ba
62003 Mustang Workshop Manual
17. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_4464/S3B~us~en~ ...

To start the testing, conditions of stable purging and vehicle speed must be satisfied. During the first
stage, the canister vent solenoid is closed, while the EVAP canister purge valve remains open,
applying and building vacuum in the system as indicated by the FTP sensor. This phase checks for
major leaks in the EVAP system.
In the second stage, the EVAP canister purge valve closes and the system looks for minimal decay
rate in the EVAP vacuum, indicating the absence of any small EVAP system leaks.
The last stage is entered only if stage two of the leak test has failed and checks whether the failed test
was due to excess vapor generation. It monitors fuel vapor generation rate. Initially, the canister vent
solenoid is opened to equalize EVAP system pressure to atmosphere. Then the canister vent solenoid
is closed, allowing pressure to build if vapor generation is present in sufficient quantity. If the rate of
generation is found to be too high, the EVAP running loss system leak test is aborted. If not, then a
small leak is diagnosed.
On-
Board Refueling Vapor Recovery (ORVR) Evaporative Emission (EVAP) System
The basic elements forming the ORVR system are as follows:
zThe fuel filler pipe forms a seal to prevent vapors from escaping the fuel tank while liquid is
entering the fuel tank. Liquid in the one inch diameter tube blocks vapors from rushing back up
the fuel filler pipe.
z A fuel vapor control valve controls the flow of vapors out of the fuel tank. The valve closes when
the liquid level reaches a height associated with fuel tank usable capacity. The valve
accomplishes the following:
„limits the total amount of fuel that can be dispensed into the fuel tank
„ prevents liquid gasoline from exiting the fuel tank when submerged (as well as when
tipped well beyond a horizontal plane as part of the vehicle rollover protection in road
accidents)
„ minimizes vapor flow resistance during anticipated refueling conditions
z Fuel vapor tubing connects the fuel vapor control valve to the EVAP canister. This routes the
fuel tank vapors, displaced by the incoming liquid, to the EVAP canister.
z A check valve in the fuel filling system prevents liquid from rushing back up the fuel filler pipe
during the liquid flow variations associated with the filler nozzle shut- off.
Between refueling events, the EVAP canister is purged with fresh air so that it may be used again to
store vapors accumulated during engine soaks or subsequent refueling events. The vapors drawn off
of the carbon in the EVAP canister are consumed by the engine.
Inspection and Verification 1. Verify the customer concern is with the evaporative emission (EVAP) system.
2. Visually inspect for the following obvious signs of mechanical damage.
Visual Inspection Chart Mechanical
z
Fuel filler cap
z EVAP test port
z EVAP canister or canister vent solenoid Klj . 3 ba
252003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_4464/S3B~us~en~ ...

z
Check that the vehicle is on level ground.
z If the vehicle is equipped with air suspension, make sure that the switch is on.
2. NOTE: The vertical wall or screen must be a minimum of 2.4 meters (8 feet) wide.
Park the vehicle on a level surface approximately 7.6 meters (25 feet) from the vertical wall or
screen directly in front of it.
3. NOTE: The center of the lamp is marked by a 3 mm (0.12 in) circle on the headlamp lens.
Mark a horizontal reference line on the vertical wall or screen. 1. Measure the center of the headlamp height to ground and record.
2. Make a 2.4 meter (8 foot) horizontal mark (masking tape) on the vertical wall or screen at the same distance from the ground as previously recorded.
4. NOTE: This procedure should be done in a dark environment to effectively see the headlamp
beam pattern.
Turn on the low beam headlamps to illuminate the wall or screen and open the hood.
5. NOTE: For SAE type headlamps, the appearance of the beam pattern may vary between
vehicles.
On the wall or screen, locate the high intensity area of the beam pattern. Place the top edge of
the high intensity zone even with the horizontal reference line.
VOR type headlamps 6. NOTE: The appearance of the VOR beam pattern may vary between vehicles.
Identify at the top edge of this high intensity area a distinct horizontal cutoff in the beam pattern.
If the top edge of this cutoff is not even with the horizontal reference line, the headlamp beam will need to be adjusted. Klj . 2 ba
42003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_5108/S3B~us~en~ ...

PINPOINT TEST B: THE POWER SEAT DOES NOT MOVE
VERTICALLY —
FRONT z
Is the resistance less than 5 ohms? A3 CHECK THE SEAT REGULATOR CONTROL SWITCH
z
Carry out the seat regulator control switch component
test. Refer to Wiring Diagrams.
z Did the seat regulator control switch pass? Yes
CHECK for obstructed or binding
seat track. If no obstructions are
found, INSTALL a new seat
track. REFER to
Seat Track .
TEST the system for normal
operation.
No
INSTALL a new seat regulator
control switch. REFER to
Switch — Seat Regulator Control .
TEST the system for normal
operation. Test Step Result / Action to
Take B1 CHECK THE MOTOR SUPPLY CIRCUITS
z
Disconnect: Front Height Motor C382.
z NOTE: Make sure all connectors are connected on the seat.
z Measure the resistance between front height motor C382, Circuit
979 (RD/LB), harness side and ground and between front height
motor C382, Circuit 990 (YE/LB), harness side and ground.
z Are the resistances less than 5 ohms? Yes
GO to
B3 .
No
GO to B2 .
B2 CHECK CIRCUIT 979 (RD/LB) AND 990 (YE/LB) FOR AN OPEN
z
Disconnect: Seat Regulator Control Switch C360.
z Measure the resistance between front height motor C382, Circuit
979 (RD/LB), harness side and seat regulator control switch C360- 7, Yes
INSTALL a new
seat regulator Klj . 3 ba
152003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_5108/S3B~us~en~ ...

Circuit 979 (RD/LB), harness side; then between front height motor
C382, Circuit 990 (YE/LB), harness side and seat regulator control
switch C360-
5, Circuit 990 (YE/LB), harness side.
z Is the resistance less than 5 ohms? control switch.
REFER to
Switch —
Seat Regulator
Control . TEST the
system for normal
operation.
No
REPAIR the circuit.
TEST the system
for normal
operation. B3 CHECK CIRCUIT 979 (RD/LB) AND 990 (YE/LB) FOR A SHORT TO
GROUND z
Measure the resistance between front height motor C382, Circuit
979 (RD/LB), harness side and ground and between front height
motor C382, Circuit 990 (YE/LB), harness side and ground.
z Are the resistances greater than 10,000 ohms? Yes
GO to
B4 .
No
REPAIR the circuit.
TEST the system
for normal
operation. B4 CHECK THE UP POSITION INPUT
z
Connect: Seat Regulator Control Switch C360.
z Measure the voltage between front height motor C382, Circuit 979
(RD/LB), harness side and ground.
z Actuate the seat regulator control switch to the front UP position.
z Is the voltage greater than 10 volts? Yes
GO to
B5 .
No
INSTALL a new
seat regulator
control switch.
REFER to Switch —
Seat Regulator
Control . TEST the
system for normal
operation. B5 CHECK THE DOWN POSITION INPUT
z
Measure the voltage between front height motor C382, Circuit 990
(YE/LB), harness side and ground. Yes
INSTALL a new
seat track. REFER
to
Seat Track .
TEST the system
for normal
operation. Klj . 4 ba
152003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_5108/S3B~us~en~ ...

PINPOINT TEST C: THE POWER SEAT DOES NOT MOVE
VERTICALLY —
REAR z
Actuate the seat regulator control switch to the front DOWN position.
z Is the voltage greater than 10 volts? No
INSTALL a new
seat regulator
control switch.
REFER to
Switch —
Seat Regulator
Control . TEST the
system for normal
operation. Test Step Result / Action to
Take C1 CHECK THE MOTOR SUPPLY CIRCUITS
z
Disconnect: Rear Height Motor C363.
z NOTE: Make sure all connectors are connected on the seat.
z Measure the resistance between rear height motor C363, Circuit 983
(RD/LG), harness side and ground and between rear height motor
C363, Circuit 982 (YE/LG), harness side and ground.
z Are the resistances less than 5 ohms? Yes
GO to
C3 .
No
GO to C2 .
C2 CHECK CIRCUIT 983 (RD/LG) AND 982 (YE/LG) FOR AN OPEN
z
Disconnect: Seat Regulator Control Switch C360.
z Measure the resistance between rear height motor C363, Circuit 983
(RD/LG), harness side and seat regulator control switch C360- 1,
Circuit 983 (RD/LG), harness side; then between rear height motor
C363, Circuit 982 (YE/LG), harness side and seat regulator control
switch C360- 6, Circuit 982 (YE/LG), harness side. Yes
INSTALL a new
seat regulator
control switch.
REFER to
Switch —
Seat Regulator
Control . TEST the
system for normal
operation.
No
REPAIR the circuit.
TEST the system
for normal
operation. Klj . 5 ba
152003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_5108/S3B~us~en~ ...

PINPOINT TEST D: THE POWER SEAT DOES NOT MOVE
HORIZONTALLY z
Is the resistance less than 5 ohms? C3 CHECK CIRCUIT 983 (RD/LG) AND 982 (YE/LG) FOR A SHORT TO
GROUND z
Measure the resistance between rear height motor C363, Circuit 983
(RD/LG), harness side and ground; and between rear height motor
C363, Circuit 982 (YE/LG), harness side and ground.
z Are the resistances greater than 10,000 ohms? Yes
GO to
C4 .
No
REPAIR the circuit.
TEST the system
for normal
operation. C4 CHECK THE UP POSITION INPUT
z
Connect: Seat Regulator Control Switch C360.
z Measure the voltage between rear height motor C363, Circuit 983
(RD/LG), harness side and ground.
z Actuate the seat regulator control switch to the rear UP position.
z Is the voltage greater than 10 volts? Yes
GO to
C5 .
No
INSTALL a new
seat regulator
control switch.
REFER to Switch —
Seat Regulator
Control . TEST the
system for normal
operation. C5 CHECK THE DOWN POSITION INPUT
z
Measure the voltage between rear height motor C363, Circuit 982
(YE/LG), harness side and ground.
z Actuate the seat regulator control switch to the rear DOWN position.
z Is the voltage greater than 10 volts? Yes
INSTALL a new
seat track. REFER
to
Seat Track .
TEST the system
for normal
operation.
No
INSTALL a new
seat regulator
control switch.
REFER to Switch —
Seat Regulator
Control . TEST the
system for normal
operation. Klj . 6 ba
152003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_5108/S3B~us~en~ ...