What are Spark Plug Wires?

They are also referred to as Ignition Wires because they are part of your ignition system. They deliver the electricity to the spark plug so that it can generate the spark to ignite the air/fuel mixture. They also play a vital role in the smooth operation of your engine. When a spark plug wire fails it can create so much resistance that the electricity never reaches the plug. Another problem is the insulation in the wire breaks causing the spark to arc outside the engine not inside where it’s needed.

When should you change your Spark Plug Wires?

There are typically only two reasons someone changes their spark plug wires. First is when the engine is running rough and misfiring. Secondly, when it is recommended by the manufacturer. A visual inspection by your Car Craft professional can help you make your decision. They will show you what to look for.

Why do your spark plug wires fail?

Your spark plug wires carry high voltages on a consistent basis. That and they are exposed to high engine temperatures in a confined compartment. This can cause a baking effect on the insulated wire covering and the protective rubber boot.

Other conditions that can weaken the insulation on the wires are water, oil and gasoline vapors over long periods of time.

You want your spark plug wires to stay operating at the best because you don’t want your engine misfiring just when you need the power. Imagine pulling out to pass or to try to merge with highway traffic only to have your engine struggling to perform.

Ask your Car Craft professional about the condition of your spark plug wires. Piece of mind is important.






Wayne Donecz


Alex Labreque

Norm Grube is knowledgeable & trustworthy.

Murray Neuman

Professional, courteous, competent and friendly

Shirley Gordon



Norm has been very professional.

Bob & Lynn Houle







Well done and great service

Frank Sebastian

Friendly staff and very knowledgeable


Share this page with someone: