If you’re driving with an ignition coil problem, your check engine light will pick this up and turn on. The check engine light is designed to tell you that there’s something wrong with the engine. Poor fuel economy can also be caused by a failing MAF sensor or a dirty engine filter, so these potential issues need to be ruled out as well. This also means that fuel leaks can be a symptom of a bad ignition coil. This happens because, when your spark plugs aren’t getting enough power (due to the faulty ignition coil), the system will try to compensate by injecting more fuel. If you notice that your car is getting less mileage from a full tank than usual, it could mean that you have a bad ignition coil. As with difficulty starting the car’s engine, there are numerous other issues that can cause misfires that need to be ruled out before you can determine conclusively that the problem is with the ignition coil.Ī faulty ignition coil can also cause the car to stall because of irregular sparks sent by the spark plug due to the faulty coil. This is why increased emissions and the smell of gas coming from the exhaust are symptoms of a bad ignition coil. Misfires are more likely to occur when the engine is under strain, and they can generate emissions. A misfire - which can sound like a coughing or sputtering noise or feel like a jerk or strong vibration - means that one of the engine’s cylinders is not firing correctly. If your engine misfires or stalls when you are idle or when you stop suddenly or accelerate, there could be a problem with your ignition coil. Of course, there are a number of different problems that can make it difficult for an engine to start, so difficulty starting the engine alone isn’t enough to confirm an ignition coil problem. If you have several bad ignition coils, you could have a faulty ignition and difficulty starting your engine. As explained above, most modern engines have multiple ignition coils. Difficulty Starting the Engineĭifficulty starting your car’s engine could indicate a problem with your ignition coil. This is why it’s important to be alert for the symptoms of a faulty ignition coil, which we’ll run through in more detail now: 1. If you have problems with your car’s ignition coils, it could affect your car’s performance. In this blog, we’ll be talking about a singular ignition coil, but most engines have at least four ignition coils, sometimes grouped together in a coil pack. Without combustion, your car isn’t going to start at all! Without the energy provided by the ignition coil, the spark plug couldn’t create the spark that’s needed for combustion. The ignition coil, which is basically a small transformer, transforms the 12 volts from the car battery into the thousands of volts needed. It’s an essential part of the ignition system.Ī car’s battery has a low voltage (12 volts), but thousands of volts are needed to initiate the ignition on the spark plug. The ignition coil, sometimes known as a spark coil, helps to start a car’s engine. The smell of gas coming from the exhaustīefore we take a closer look at any possible ignition coil problems, it will be useful to learn a little bit more about what an ignition coil is and how it works.A decrease in car power, especially in acceleration.If your car is experiencing any of the problems listed below, you may have a faulty ignition coil on your hands: The bag contains a fine abrasive that sand-blasts the residue off the electrode.There are several possible symptoms of an ignition coil problem. If your spark plug has white or black residue coating it, you can clean it by placing it in a spark plug cleaner bag that attaches to an air compressor.Some spark plugs come with pre-measured gaps while you’ll need to use a spark plug gap tool to properly measure and adjust the size for universal plugs. If you need to get new spark plugs, check your vehicle’s manual to know the proper gap sizes to use so they create a spark strong enough for your engine.If you see any issues, then it’s time to change your spark plugs. Look for signs of damage, like a rounded electrode or worn-down insulation in the middle of the cylinder. Remove the spark plugs from your engine one at a time using a spark plug socket wrench, and visually inspect them. Locate your spark plugs by finding where the thick black cables attach to your engine cylinders. Fouled spark plugs may not be able to produce a spark.
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