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Fine lets take a look at a spark plug, this particular engine has what they call coil over plugs so the ignition goes over the plug. You have to disconnect the coil and remover it from the top of the spark plug.

With the ignition coil removed use a ratchet and a spark plug socket to remove the spark plug from the cylinder head. If you have wires running to your spark plug grab them by the boot not the wire itself. Rotate the boot slightly in both directions then pull the boot of the spark plug.

Special pliers like tool can make this job easier. It’s a good idea to mark the wires as you remove them to make sure you get them back to the correct locations. While the wires are off inspect them for hardening, cracking and blocked areas which indicates shorting. If you have any problems replace all wires as I said. Be sure to check the gap of each spark plug which must be of the correct specification.

If your check engine light and you think you’ve fixed the problem by replacing the spark plugs you want to clear off the trouble codes and turn of the light for about he cost of an hours labor at the dealer you can purchase an easy to use code scanner tool that will do the job quickly. The intervals recommended in your hands repair manual are designed to maintain engine performance and fuel economy. In some cases there are more frequent than recommended by the vehicle manufacturer.

In some cases replacing spark plugs can be a part of diagnosing the car when it’s running poorly. At the very least you will be able to see if there is any falling on the plugs and use a chart like this that’s in your hands manual to help identify the problem.

In case you didn’t see the video in part 1 of this series… here it is again.

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Engine Work