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2003 Chevrolet Corvette Restoration Kit
Ignition System Description
The electronic ignition system controls fuel combustion by providing a spark to ignite the compressed
air/fuel mixture at the correct time. To provide optimum engine performance, fuel economy, and control of
exhaust emissions, the PCM controls the spark advance of the ignition system. The electronic ignition
system does not use the conventional distributor and coil. The electronic ignition system has the following
advantages over a conventional mechanical distributor system:
•
No moving parts
•
Less maintenance required
•
Remove mounting capability
•
No mechanical load on the engine
•
More coil cool down time between firing
•
Elimination of mechanical timing adjustments
•
Increased available ignition coil saturation time
The ignition system on this vehicle feature a multiple coil ignition and is known as coil near plug. The
secondary ignition wires are short compared with a distributor ignition system wire. Eight ignition
coils/module are individually mounted above each cylinder on the rocker covers. The coil/modules are
fired sequentially. There is an Ignition Control (IC) circuit for each ignition coil/module. The eight ignition
control circuits are connected to the PCM. All timing decisions are made by the PCM, which triggers each
coil/module individually.
The electronic ignition system consists of the following components:
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Crankshaft pOSition sensor
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Crankshaft position sensor reluctorwheel
•
Camshaft position sensor
•
Ignition coils
•
Powertrain control module (PCM)
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