AutoZone Product & HowTo Info | Z | coil - ignition

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    Coil - Ignition

    Coil - Ignition Operation:

    An electrical device consisting of wire loops wrapped around a central core. It's a pulse-type transformer that produces a short burst of high voltage needed to make the current "jump" the gap at the spark plugs. The primary windings receive nominal battery voltage on the positive side of the coil. On the negative side of the coil, this nominal battery voltage is boosted by the secondary windings and is held in place until the precise moment the release is signaled. Conventional contact points, the pick-up coil or reluctor assembly, hall effect switch or crankshaft positioning sensor, are all devices used discharge the ignition coil and fire the spark plugs.

    How To Instructions:

    Inspect - Check for obvious problems.
    Test - Give it an in-depth diagnosis.
    Replace - Out with the old, in with the new.

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