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

You can use a multimeter to test the resistance to be sure. Q: How Can You Tell if a Spark Plug Is Firing? A: The grounding test is performed to determine if a plug is firing.

Car Care: Take cars that misfire to a repair shop, where their spark plugs and ignition boots should be checked.

Changing your spark plugs is an essential (and relatively easy) part of car maintenance--here's how to do it.

Keep your vehicle running in top shape by replacing the spark plug wires.

Typically, a do-it-yourself plug wire kit is boxed with the spark plug terminals and boots already attached to the wires. The wires are already cut to approximate lengths but are left long to ...