Ford 2003 Mustang Workshop Manual page 2081

SECTION 303-07C: Engine Ignition — 4.6L (4V)
DESCRIPTION AND OPERATION
Engine Ignition
Eight separate ignition coils:
are controlled by the powertrain control module (PCM).
are mounted directly above each spark plug.
are controlled by the powertrain control module for correct firing sequence.
The spark plug:
changes the high voltage pulse into a spark which ignites the fuel and air mixture.
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.
is 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:
position of the crankshaft in 10 degree increments
the crankshaft speed (rpm)
For additional information, refer to Section 303-14 .
2003 Mustang Workshop Manual