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

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 ...

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.