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Can you drive a car with bad coils?

The short answer is no, you should not drive a car with bad coils. Faulty ignition coils can cause significant issues with your vehicle's performance and can even lead to engine damage if left unaddressed. In this article, we'll explore the importance of ignition coils and why driving with bad coils is not recommended.


What Are Ignition Coils?


Ignition coils are essential components in a vehicle's ignition system. They are responsible for converting the low-voltage current from the battery into the high-voltage spark that ignites the air-fuel mixture in the engine's cylinders. Each cylinder in an engine has its own ignition coil, and if one or more of these coils fail, it can lead to various problems with the engine's performance.


Symptoms of Bad Ignition Coils


Some common symptoms of bad ignition coils include:



  • Rough idling or engine misfiring

  • Reduced engine power and acceleration

  • Decreased fuel efficiency

  • Difficulty starting the engine

  • Check engine light illumination


If you experience any of these issues, it's important to have your vehicle inspected by a qualified mechanic to determine the root cause and address the problem.


Risks of Driving with Bad Coils


Driving with bad ignition coils can lead to several risks, including:



  • Engine Damage: Misfiring caused by bad coils can lead to unburned fuel being expelled into the exhaust system, which can damage the catalytic converter and other components.

  • Decreased Performance: Faulty coils can cause a significant reduction in engine power and acceleration, making it unsafe to drive, especially at higher speeds.

  • Increased Emissions: Misfiring caused by bad coils can result in increased emissions, which is not only harmful to the environment but may also lead to legal issues in areas with strict emissions regulations.


To avoid these risks, it's best to have any issues with your vehicle's ignition system addressed as soon as possible by a qualified mechanic.


Conclusion


In summary, driving a car with bad ignition coils is not recommended, as it can lead to significant performance issues, engine damage, and increased emissions. If you suspect your vehicle has a problem with its ignition system, it's important to have it inspected and repaired by a professional to ensure the safe and reliable operation of your car.

How hard is it to fix an ignition coil?


Replacing an ignition coil is a basic repair procedure you can do at home with tools from your local AutoZone. That being said, many of today's vehicles, especially with engines positioned sideways, can make testing/changing an ignition coil a bit more complicated.



How much does it cost to fix an ignition coil?


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.



How expensive is it to fix a misfire?


Depending on the cause of the problem, an issue with a misfiring cylinder can be fairly expensive. For something like a faulty spark plug, repair work should only cost somewhere in the range of $150 to $400. For something more serious, like a blown head gasket, costs can shoot up into the thousands of dollars.



How long can you drive on a bad coil?


How Long Can You Drive with a Bad Ignition Coil? Just long enough to get to your nearest Firestone Complete Auto Care! A faulty ignition coil can lead to serious discomfort on the road — from stalling and backfiring to engine misfiring.



Are ignition coils worth replacing?


Ignition coils are vital to your car's performance, fuel efficiency, and longevity, so neglecting them can lead to larger issues down the road. They're not that expensive - so replacing them preventatively is definitely worth it.



What happens if you run a car with a bad ignition coil?


Driving with bad coil packs can lead to several issues, including poor engine performance, reduced fuel efficiency, and potential damage to other engine components. While you may be able to drive your car for a short period with failing coil packs, it's not advisable to do so for an extended time.



How long can I drive with a bad ignition coil?


How Long Can You Drive with a Bad Ignition Coil? Just long enough to get to your nearest Firestone Complete Auto Care! A faulty ignition coil can lead to serious discomfort on the road — from stalling and backfiring to engine misfiring.



How long can you drive on a bad ignition coil?


How Long Can You Drive with a Bad Ignition Coil? Just long enough to get to your nearest Firestone Complete Auto Care! A faulty ignition coil can lead to serious discomfort on the road — from stalling and backfiring to engine misfiring.



Can a bad coil affect engine performance?


Spark plugs need to fire hundreds of times every minute to keep the engine powering along. If one of your spark plugs is suddenly starved of electricity by a bad ignition coil, it won't fire as much and that cylinder will lose power. As a result, you'll find it harder to accelerate, especially when driving uphill.



Can I drive with a misfiring ignition coil?


Coil Pack Problems Usually, if a coil pack is bad, there will be a loss of fire or spark in one or more cylinders... Driving with a misfiring cylinder is not safe under any condition. It can cause severe damage to your car's engine and thus most of the people advise not to drive with this problem.


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.