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Are ignition coils worth replacing?

As a car owner, understanding the components that keep your vehicle running smoothly is essential. One such component is the ignition coil, a crucial part of your car's ignition system. In this article, we will explore the importance of ignition coils, the signs that indicate they may need replacement, and whether investing in new ignition coils is worth it.


What Are Ignition Coils?


Ignition coils are electrical devices that transform the battery's low voltage into the high voltage needed to ignite the air-fuel mixture in the engine's cylinders. Essentially, they play a vital role in starting your vehicle and ensuring it runs efficiently. Most modern vehicles use one ignition coil per cylinder, while older models may have a single coil for multiple cylinders.


Signs That Your Ignition Coils Need Replacement


Recognizing the symptoms of failing ignition coils can save you from more significant issues down the road. Here are some common signs that indicate it might be time to replace your ignition coils:



  • Engine Misfires: If you notice your engine sputtering or misfiring, it could be a sign that the ignition coils are failing to deliver the necessary spark.

  • Decreased Fuel Efficiency: A drop in fuel efficiency can occur when ignition coils are not functioning correctly, leading to incomplete combustion.

  • Check Engine Light: If your check engine light comes on, it may indicate a problem with the ignition system, including the coils.

  • Rough Idling: A rough or shaky idle can be a symptom of faulty ignition coils, causing uneven engine performance.

  • Difficulty Starting: If your vehicle struggles to start or takes longer than usual, it could be due to weak ignition coils.


Are Ignition Coils Worth Replacing?


Replacing ignition coils can be a worthwhile investment for several reasons:



  • Improved Performance: New ignition coils can restore your vehicle's performance, ensuring smooth acceleration and efficient fuel combustion.

  • Prevent Further Damage: Ignoring faulty ignition coils can lead to more severe engine problems, which can be much more expensive to repair.

  • Enhanced Fuel Efficiency: Replacing worn-out coils can improve your vehicle's fuel efficiency, saving you money at the pump.

  • Increased Reliability: New ignition coils can enhance the overall reliability of your vehicle, reducing the likelihood of breakdowns.


Conclusion


In summary, ignition coils are a critical component of your vehicle's ignition system. If you experience any signs of failure, replacing them is often a wise decision. Not only can it improve your car's performance and fuel efficiency, but it can also prevent more costly repairs in the future. If you're unsure about the condition of your ignition coils, it's always best to consult with a professional mechanic who can provide a thorough inspection and advice tailored to your vehicle's needs.

Frequently Asked Questions

Why are ignition coils so expensive?


Why are ignition coils so expensive? These are precision components. As a typical spark plug is fired eight times a second, ignition coils have to be well made. Being tempted by a low-quality part is a false economy.



Should you replace spark plugs when you replace ignition coils?


Around the sides. And if the iridium breaks or there's an internal fault in the plug. It's making that coil work that much harder it's going to heat up the coil.



How much should it cost to replace ignition coils?


For standard vehicles with conventional ignition coils, replacing a single ignition coil can range from $100 to $300. However, for vehicles equipped with more advanced ignition systems like coil-on-plug (COP) or distributorless ignition system (DIS) coils, the cost may be higher, ranging from $200 to $600 per coil.



What is the life expectancy of an ignition coil?


80,000 to 100,000 miles
The ignition coils in your car's engine must consistently generate huge 15,000 to 20,000-volt charges of electricity so the spark plugs can keep igniting the engine's fuel. Despite how hard ignition coils work, they have a relatively long expected lifespan of 80,000 to 100,000 miles.



Should I replace spark plugs when I replace ignition coils?


Not only your acceleration. Your lack of acceleration. But also your fuel mileage if you have less spark it's not going to ignite the fuel properly. And that's going to be wasting gas.



Can I drive with a bad ignition coil?


Can You Drive with a Bad Ignition Coil? If you're rocking a single ignition coil, you probably won't be able to start your car, let alone drive it. If you have a COP setup, it may be possible to drive your vehicle with a failed coil, but we advise against it since doing so can be unsafe and damaging to your engine.



Will a new ignition coil improve performance?


Regularly replacing worn coils will not only save you in future repairs, it will also optimize your machine's performance and reliability. Ensuring that your engine is operating at its best with each spark.



Does replacing ignition coils make a difference?


  • Improved Spark Quality : A new ignition coil can provide a stronger and more consistent spark, leading to better combustion of the air-fuel mixture.
  • Better Fuel Efficiency
  • Enhanced Acceleration
  • Reduced Misfires
  • Overall Engine Health



How often should ignition coils be replaced?


Ignition coils typically do not have a specific replacement interval, but they can last anywhere from 60000 to 100000 miles (approximately 96000 to 160000 kilometers) under normal driving conditions. However, factors such as engine type, driving habits, and maintenance practices can affect their lifespan.



What are the symptoms of a bad ignition coil?


The signs below from your Lexus dealer will warn you when it's time for repairs to avoid engine damage and expensive repairs.

  • The Check Engine Light Is On.
  • Your Car Feels Slow.
  • Your Car Is Heavy on Gas.
  • Your Car's Engine Misfires.
  • Your Car Backfires.
  • You Struggle with Starting and Stalling Issues.
  • You Hear Sputters and Coughs.


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.