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One of the most vital of all ignition system components is the ignition coil. This apparatus converts relatively low voltage electricity derived from a vehicle’s battery, into high-voltage capable of being dissipated by a vehicle’s spark plugs. During this dissipation of energy, a volatile mixture of air and fuel is ignited within each respective combustion chamber.
Unfortunately, like any electrical component, an ignition coil is prone to eventual failure, leaving one to contend with a host of troubling symptoms as a result. The ability to recognize these symptoms can prove helpful when attempting to diagnose the issue at hand, thereby expediting a vehicle’s eventual return to service.
An ignition coil is a device used to transform a vehicle’s supply battery voltage into high-voltage electricity, intended for rapid discharge. Devices of this nature are typically described as step-transformers or induction coils.
The following are several of the most common symptoms associated with a failed ignition coil.
Illuminated check engine light
Reduced engine power
Loss of fuel economy
Intermittent stalling
Hard starting
Backfiring
Excessive engine vibration
Normal wear and tear
Excessive vibration
Abnormally high engine heat
Compromised spark plugs
In the most severe cases, prolonged operation of an engine with a faulty ignition coil can actually do irreversible catalyst damage. This occurs when unburnt fuel is dosed downstream, allowing a catalytic converter’s internal media to superheat and deteriorate. As a result, one incurs a significant expenditure in both time and money, all of which would likely have been avoided.
In any event, a vehicle’s faulty ignition coil should be isolated and replaced as soon as possible. Doing so will likely prevent excess hardship, and mitigate the risk of being saddled with an even higher repair bill.
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