Operation - Dodge dakota 2002 Service Manual

8I - 20 IGNITION CONTROL
IGNITION COIL (Continued)
4.7L V-8
The 4.7L V–8 engine uses 8 dedicated, and individ-
ually fired coil (Fig. 30) for each spark plug. Each
coil is mounted directly to the top of each spark plug
(Fig. 32).
Fig. 32 IGNITION COIL LOCATION - 4.7L V-8
1 - IGNITION COIL
2 - COIL ELECTRICAL CONNECTOR
3 - COIL MOUNTING STUD/NUT
5.7L V-8
The 5.7L V–8 engine uses 8 dedicated, and individ-
ually fired coil (Fig. 33) for each pair of spark plugs.
Each coil is mounted directly to the top of each spark
plug (Fig. 34). Each coil is bolted to the valve cover.
5.9L V-8
A single ignition coil is used (Fig. 35) or (Fig. 36).
The coil is not oil filled. The coil windings are embed-
ded in an epoxy compound. This provides heat and
vibration resistance that allows the coil to be
mounted on the engine.
8.0L V-10
Two separate coil packs containing a total of five
independent coils are attached to a common mount-
ing bracket. They are located above the right engine
valve cover (Fig. 37). The coil packs are not oil filled.
The front coil pack contains three independent epoxy
filled coils. The rear coil pack contains two indepen-
dent epoxy filled coils.
Fig. 33 IGNITION COIL - 5.7L V-8
1 - IGNITION COIL
2 - MOUNTING BOLTS (2)
3 - BOOT TO SPARK PLUG

OPERATION

3.7L V-6
Battery voltage is supplied to the 6 individual igni-
tion coils from the ASD relay. The Powertrain Con-
trol Module (PCM) opens and closes each ignition coil
ground circuit at a determined time for ignition coil
operation.
Base ignition timing is not adjustable. By con-
trolling the coil ground circuit, the PCM is able to set
the base timing and adjust the ignition timing
advance. This is done to meet changing engine oper-
ating conditions.
The ignition coil is not oil filled. The windings are
embedded in an epoxy compound. This provides heat
and vibration resistance that allows the ignition coil
to be mounted on the engine.
Because of coil design, spark plug cables (second-
ary cables) are not used with the 3.7L V-6 engine.
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