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Coil, ignition

The Ignition Coil Explained by Mister-Auto

The ignition coil is a sealed unit that produces a high-voltage electrical pulse in order to create an ignition spark. It contains two separate coils of wire, one inside the other. Using mutual induction, the electro-magnetic charge can be transferred from the external coil to the inner coil, making it possible to convert 12v of electricity from the car battery to the 10,000v required to create a spark. Both coils are contained in oil to help prevent overheating.

There are several signs that you need to buy a new ignition coil, these include backfiring, starting problems, misfiring, stalling and decreased fuel economy. If you’re experiencing any or all of these, the ignition coil is a good place to start. A quick way to test it is by running your vehicle for 30 minutes, then gently tap on the component with the head of a screwdriver. If the engine cuts out, it’s normally a clear indication you need to replace your ignition coil.

How to Remove the Ignition Coil

Luckily it’s easy to replace a faulty ignition coil. All you have to do is buy an ignition coil online and follow the simple steps below:

  1. Disconnect the battery

    The first step is to disconnect the negative terminal using a socket. You should then repeat this on the positive terminal making sure not to let the wire touch any metal part of the car as there can be a residual current.

  2. Disconnect and remove the ignition coil

    Next you will need to use a small screwdriver to remove the screws that hold the ignition coil in place. These are normally 7 and 8mm. Make sure you place them on a tray to keep them together. It can be difficult to remove the ignition coil depending on the type of engine you have—try gently twisting or even rotating it fully. You should then be able to pull it up and out of the vehicle.

  3. Insert the new ignition coil

    You will then need to place the new ignition coil into position, and secure it using the nuts and bolts. Often there is a resistor that is placed on one of the bolts.

  4. Reconnect the battery

    Finally, reconnect the negative and positive terminal. It’s important to make sure that they are connected in the same pattern as before. There are usually numbers or marks indicating which wire connects to which to base.

Buy an Ignition Coil Online at Mister-Auto

If you need to buy an ignition coil online then try Mister-Auto. With over 300,000 products by the top auto manufacturers and brands, we’re one of the leading online marketplaces for spare parts and accessories. What’s more, thanks to our intuitive search feature, finding the right ignition coil for your vehicle is easier than ever. Simply enter your make, model, fuel and engine type, and we’ll locate the part you need in seconds—quick & easy! So, for unbeatable deals, try Mister-Auto today.

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