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 ...

A spark plug can eject either due to poor design or a lack of sufficient torquing. You can fix this by tightening a loose ...

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 ...

How often you change the spark plugs in your car depends on the recommendations of its manufacturer. Typically, it'll be somewhere around the 100,000-mile mark for new vehicles, but it could be much ...