Back in the day, cars had a lot of ignition parts that today don’t even exist. Like spark plug wires. But no matter how exotic or mundane, all cars still use spark plugs. And spark plugs wear out, now if you know how to read the spark plugs that you take out of your engine, you can determine the general condition of your engine. Find us on your TV @ http://www.motorweek.org/about/station_listings