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What happens when a coil goes bad?

When a coil in an electrical or mechanical system goes bad, it can lead to a variety of issues that can impact the overall performance and functionality of the device. In this article, we'll explore the common signs of a bad coil and the potential consequences of a malfunctioning coil.


Symptoms of a Bad Coil


There are several telltale signs that a coil may be going bad, including:



  • Reduced power or performance: A bad coil can cause a decrease in the power output or overall performance of the device. This may be noticeable as a loss of acceleration, reduced engine power, or decreased efficiency.

  • Misfiring or irregular firing: A bad coil can cause the engine or device to misfire or fire irregularly, leading to a rough or uneven operation.

  • Increased fuel consumption: A malfunctioning coil can cause the engine to burn more fuel than necessary, leading to decreased fuel efficiency.

  • Check engine light illumination: Many modern vehicles and devices have sensors that can detect a problem with the coil, triggering the check engine light or a similar warning indicator.


If you notice any of these symptoms, it's important to have the coil inspected and replaced if necessary to prevent further damage to the system.


Consequences of a Bad Coil


A bad coil can have a range of consequences, depending on the specific device and the severity of the issue. Some potential consequences include:



  • Decreased engine performance: In a vehicle, a bad coil can lead to a noticeable decrease in engine power, acceleration, and overall performance.

  • Increased emissions: A malfunctioning coil can cause the engine to produce more emissions, which can be harmful to the environment and may violate local regulations.

  • Damage to other components: If a bad coil is left unchecked, it can lead to further damage to other components in the system, such as the spark plugs or the engine itself.

  • Safety concerns: In some cases, a bad coil can pose a safety risk, such as an increased risk of engine failure or fire.


To avoid these consequences, it's important to address any issues with a coil as soon as they are detected and to have the coil replaced by a qualified technician if necessary.

Kevin's Auto

Kevin Bennett

Company Owner

Kevin Bennet is the founder and owner of Kevin's Autos, a leading automotive service provider in Australia. With a deep commitment to customer satisfaction and years of industry expertise, Kevin uses his blog to answer the most common questions posed by his customers. From maintenance tips to troubleshooting advice, Kevin's articles are designed to empower drivers with the knowledge they need to keep their vehicles running smoothly and safely.