What to do after changing the ignition coil?

What is the best approach after replacing the ignition coil that a driver should know? After replacing the ignition coils in your engine, the best approach is to be proactive.

Since ignition coils fail for many different reasons, every driver should become familiar with the most common causes, and the best ways to minimize these risks. Specifically, when it comes to replacing other parts like spark plugs that work in tandem with the ignition coil.

Common Causes of Ignition of Coil Failures

Bad or worn-out spark plugs

To protect the life span of the ignition coils in the car, it is important that drivers pay close attention to the condition of the spark plugs in the vehicle, too.

Since the ignition coils and spark plugs serve similar functions, both need to be in good working condition at all times. For example, the ignition coil is designed to convert low voltage from the vehicle’s battery into a higher voltage.

And, once the conversion of voltage is complete, the spark plugs use the spark that is created by the ignition coil to ignite the fuel in the engine.

Therefore, both the ignition coil and the spark plugs must function properly in order for these components to remain in optimum condition.

Shortages and breaks in the Secondary Windings

Another problem that causes ignition coils to fail is related to shortages and breaks in the secondary windings. These issues usually occur when the ignition coils are damaged by vibrations.


The condition of the ignition coils may be negatively impacted by problems with conducting electricity. These problems are normally directly related to issues with overheating.

Best Way to Minimize Risks of Further Damages

Once drivers have become knowledgeable about the problems that cause ignition coil failures, they can devise a plan to minimize these risks.

For example, because the ignition coils and the spark plugs work together to ignite the fuel in the engine, it is highly recommended that the owner of the car inspects the spark plugs to see if they are in good condition.

If both are not replaced at the same time, it increases the chances of the engine misfiring, dealing with start-up troubles, loss of power, and poor fuel economy.

Simply stated, if any of the spark plugs are worn or bad, they will need to be replaced as soon as the new ignition coils have been installed.

Taking care of both the ignition coil and the spark plugs simultaneously, will not only minimize the risks of encountering unnecessary problems but also eliminate the need for paying for more costly repairs.

  • The average cost of replacing faulty coils – Between $200 and $300
  • The average cost of replacing bad spark plugs – Between $16 and $100


If you have problems with your ignition coils that require them to be replaced, you need to do a thorough job of correcting the entire problem.

By taking proactive measures, you can avoid unnecessary costly damages and the added risks of the car malfunctioning.

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