Engine Performance (A8)Question 100 of 120
In a modern coil-on-plug ignition system, each coil:
a.Powers all cylinders at once
b.Is triggered by a mechanical distributor
c.Stores fuel for injection
d.Fires the spark plug directly on its cylinder, controlled by the PCM
Explanation
Coil-on-plug systems place an individual coil at each spark plug, fired by the PCM through the ignition driver, eliminating plug wires and the distributor. This improves spark control and misfire diagnosis. A failed coil typically causes a cylinder-specific misfire code.
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