Spark plugs are essential in ensuring that your vehicle performs at its best. If yours need changed, and you want to do it yourself, here's what you'll need.

Attach the spark plug to a spark plug tester, then connect the tester to the ignition wire. Start the engine and observe the ...

Spark plugs are essential in ensuring that your vehicle performs at its best. If yours need changed, and you want to do it yourself, here's what you'll need.