When you want to go somewhere far away, it is as simple as turning the key in your vehicle’s ignition and then comfortably driving to where you need to go. However, this simplicity can quickly become a nightmare when certain parts of the vehicle break down, because turning the key may result in nothing happening, or the vehicle will not run as smoothly. When this happens, there are a number of parts to check and one of them is the spark plug wires.

Featured Products

Featured Brands

The engine in your vehicle is basically designed to turn fuel into mini-explosions inside each cylinder, which will cause the parts to move in the right order, at the right speed, so your wheels start or continue turning. The spark is provided by the spark plug that needs to get power from somewhere. This is where spark plug wires designed to carry high voltage over quite a long distance to the spark plug enter the picture.

As you would imagine, the spark plug wires need to be very strong to handle the amount of voltage moving along them. They also need to be able to live among serious heat and vibrations, because they are so close to the engine that they will actually touch it. To protect each wire from all of these problems and more, you will find thick insulation wrapping each one to make it perhaps the biggest and widest wire anywhere on your vehicle. The insulation is usually made of substances like rubber or particularly tough plastics to handle heat, vibration and liquids like oil.

While the insulation is some of the thickest you can find on any wiring, you will of course discover problems with wear and tear when the vehicle reaches a certain age. The insulation is not designed to live forever, since that would be impossible, and as it begins to break down problems will become more and more serious. One of the most common problems is that the electrical current is able to escape before reaching the spark plug, and this means the spark plug is unable to provide enough spark to cause all of the fuel to burn efficiently.

When problems occur, you will be notified by a number of symptoms. The worst case scenario is that the engine will simply not run, because the spark plugs are not receiving any power to ignite any of the fuel. Before that happens, you may notice things like rough idling or the engine threatening to stall, and this can occur if the spark plugs are receiving their power but only after a short delay, or they are not receiving enough power. When you think it may be the spark plug wires, you can check to see whether there are sparks or sounds coming from the wires while the engine is running, and this can prove that the wires are allowing power to escape.

Related Categories

Guides & Articles

  • Ignition Parts
    Understanding The Different Types Of Spark Plugs
    Since the dawn of the automobile, spark plugs have been an integral part of gasoline engines because they conduct the electrical energy from a vehicle’s ignition system needed to finalize the combustion process. After the gas/air mixture has been fully compressed inside the cylinder head, spark plugs serve a miniature bolt of lightning to create an explosion which pushes a piston downward.

Browse by Vehicle

Spark Plug Wires Reviews

Average rating:  4.5  4.7 - 65 reviews
Read All Spark Plug Wires Reviews
5 of 5
Great Product
Outstanding product overall.
APosted by Antonio (Cordova, TN) /
2002 Pontiac Grand Prix
Was this review helpful for you? Yes
View More
Related Spark Plug Wires Pages

All manufacturer names, symbols, and descriptions, used in our images and text are used solely for identification purposes only.
It is neither inferred nor implied that any item sold by CARiD.com, is a product authorized by or in any way connected with any vehicle manufacturers displayed on this page.