Spark Plug Wire Puller (For older vehicles without coil packs) Multimeter (for resistance test) Spark Plug Socket Sockets (for cars with coil packs) A spark plug that’s known to work ...

Check, replace and maintain the spark plugs in your car or motorcycle with this easy guide.

Every small gasoline engine has a spark plug, and this key component requires periodic inspection and testing. Learn how to do it here.

A tech article on testing and reading your spark plugs. Find all the details inside Circle Track Magazine.