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Video:How to Replace Spark Plug Wires

with Matt Ediger

Want to know how to replace spark plug wires on your own? Here, see information about replacing spark plug wires and why they need to be changed.See Transcript

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Transcript:How to Replace Spark Plug Wires

Hi I'm Matt Ediger from DownForce Motoring for About.com and this is how to replace spark plug wires.

What Are Spark Plugs?

Spark plug wires are often overlooked aspects of your vehicle; eventually they do wear out, reducing your cars performance and efficiency. In this video we'll show you how to replace them. This job can be done in your driveway.

Why Do We Replace Spark Blug Wires?

Spark plugs are what ignites the air fuel mixture in your engine, Here's how it happens: with the car running your alternator powers the cars coil which is plugged into your cars distributor. From here the distributor tells which wire or cylinder to get the voltage. Hence, the name: distributor. From here up to 60 thousand volts passes through the wire to the spark plug, which creates a spark between these two points, and ignites the air/fuel mixture. This happens thousands of times a minute.

Information About Replacing Spark Plug Wires

With this knowledge, we also have to factor in environmental aspects the heating and cooling cycles of your engine temperatures under your hood especially near the engine can reach near 200 degrees Fahrenheit. This all has effects on the wires themselves and eventually they deteriorate, although you may not be able to see it, inside the insulation the wire can begin to crack and loose it's ability to send electricity. Which, has a direct effect on the performance of your car. If, when inspecting the wires you find small cracks in the insulation this is another good sign that it's time to replace them.

If you believe that your spark plug wires are due for a change, head over to your local parts store and buy a new set. The process of changing them is fairly simple and should be done like so. Start with the coil wire, it should be the shortest, and work one at a time. Until all of the wires have been replaced if you have a V8 this step is very important as getting the wires crossed up on the distributor can lead to a misfire, which could potentially cause serious engine damage. With the job completed the new wires should be good for another 100k miles.

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