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 ...

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 ...

We may receive a commission on purchases made from links. When it comes to engine care 101, a spark plug replacement — also referred to as a tune-up — is an essential task. Spark plugs, as the name ...

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 ...