2003 FORD MUSTANG Workshop Manual

Page 2073 of 4378

FORD MUSTANG 2003  Workshop Manual DIAGNOSIS AND TESTING 
Engine Ignition 
Refer to the Powertrain Control/Emissions Diagnosis (PC/ED) manual. 
SECTION 303-
07B: Engine Ignition — 4.6L (2V)  2003 Mustang Workshop Manual  Klj .  1

Page 2074 of 4378

FORD MUSTANG 2003  Workshop Manual REMOVAL AND INSTALLATION 
Ignition Coil —
Coil On Plug 
Removal  1. Disconnect the battery ground cable (14301). For additional information, refer to  Section 414 -
01  . 
2. Remove the air cleaner

Page 2075 of 4378

FORD MUSTANG 2003  Workshop Manual Klj .  2 ba
  22003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_4464/S3B~us~en~ ...

Page 2076 of 4378

FORD MUSTANG 2003  Workshop Manual 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

Page 2077 of 4378

FORD MUSTANG 2003  Workshop Manual �z
Install a new spark plug. 
5. Inspect for carbon fouling.  �zThis can be identified by black, dry fluffy carbon deposits on insulator tips, exposed shell 
surfaces and electrodes. 
�z This may be c

Page 2078 of 4378

FORD MUSTANG 2003  Workshop Manual 8. Inspect for overheating. 
�zThis can be identified by a white or light gray insulator with small black or gray brown 
spots and with bluish- burnt appearance of the electrodes. 
�z This may be caus

Page 2079 of 4378

FORD MUSTANG 2003  Workshop Manual 2. To install, reverse the removal procedure.  Klj .  4 ba
  42003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_4464/S3B~us~en~ ...

Page 2080 of 4378

FORD MUSTANG 2003  Workshop Manual 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