![]() With the car turned off, open the hood to locate the ignition coil.If you want to test to see if the ignition coil of your car has failed, these are some simple steps to do so. They incorporate the electronic system from the electronic ignition coil. Coil on plug: In these systems, each spark plug has its own ignition coil.This type works a bit differently because it uses a magnetic device to change speeds. The ignition coils come in packs or have a few ignition coils together in one unit. Distributorless: This system uses one ignition coil for every two cylinders.These ignition coils were commonly used in the early 1970s. However, instead of the distributor cam breaking the connection, there is an electronic system to send a signal and start the ignition. Electronic: This type of ignition coil function is similar to the conventional coil.Then the distributor cap sends the current to the spark plugs. The battery sends power to the primary coil and when the connection is broken suddenly by the distributor cam, it induces a higher voltage to the secondary coil. The ignition coil and the distributor together make up the complete distributor system. Conventional: This type of distributor system has been used since the early 1900s.Because the ignition is working harder, it can easily overheat. This will cause the ignition coil to operate at a higher voltage. Another cause could be that in the spark plugs, the gap is bigger due to erosion. This can cause the housing of the wire coils to break, and an oil leak will occur. When an ignition coil is not functioning properly, it can overheat. ![]() ![]() Codes P0350 to P0362 are reserved for ignition coil circuit malfunctions. The possible standard diagnostic trouble codes (DTCs) are P0300 through P0312, which are codes for a detected misfiring. You can also do this yourself with an OBD-II scanner, which you can purchase online or from a local auto parts store. An easy way to know what is wrong is to take your car to a mechanic for an OBD-II check. If your car’s engine light suddenly turns on, this could be a sign that something is bad with the ignition coil. However, a bad ignition coil won’t generate any power, and in turn, there would be no spark for the combustion to start. If you hear a clicking noise when you try to turn on the car, the ignition coil is probably still working. If more than one spark plug doesn’t receive enough power, the car won’t start at all. Having the whole system depending on one ignition coil is a major problem when it malfunctions, but this can also happen with any other configuration. This is more common for a car with only one ignition coil. The sensors get faulty and can change the fuel-to-air mixture, creating even more problems like the car slowing down instead of accelerating. Also, when a car misfires, it generates more emissions and can ruin other parts, like the catalytic converter. Misfires can occur at any time but are most common at the time the engine is under more load, like when you are accelerating. Other causes could be issues with the fuel delivery system, spark plugs, and plug wires. These are clear signs of a failed ignition coil. It can lead to weird cough-like noises, jerking motions, and vibration while the car is idling at a stop sign or light. Engine Misfiring or StallingĪn engine misfiring is when one of the cylinders fires incorrectly or doesn’t fire at all. This issue is one that has to be checked immediately or it could lead to serious and more expensive problems to your car. This is identified by a strong smell of gasoline or fire coming out of the exhaust due to the random explosions. A clear sign of this happening is when your car starts emitting black smoke.
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