Spark plugs are a vital part of a gasoline-powered car’s engine. Without them the engine won’t start, and if they’re in rough shape the engine will run poorly. Nearly all gasoline-powered cars are ...

This used to be a great DIY task, but not any more. Spark plugs often come pre-gapped, but in the trade, we never trusted that what came out of the box was still accurate. You have to account for ...

Have you ever watched your Mustang's ignition system in the dark with the engine running? Because ignition systems produce 20,000 to 50,000 volts of high-energy electricity, a certain amount escapes ...