Electronic Ignition System Components

MODULE/COIL PACK
The electronic ignition module accepts ignition timing information from the PCM. It charges up the appropriate ignition coil to a preset current limit then turns off the primary current at the desired engine position to create a high voltage signal that is routed to the spark plug to ignite the air/fuel mixture.


SECONDARY WIRES
The secondary wires transmit the high voltage energy from the coil secondaries to the spark plugs.

NOTE: Orientation of the wires to the EI module is critical to the operation of both the module and on-board diagnostics. The orientation is 4 1 2 3 respectively from left to right.


SPARK PLUGS
The spark plugs allow the high voltage energy from the coils to arc across a gap to ignite the air/fuel mixture.