Spark plugs break from overtightening, carbon buildup, or age. Do you know how to remove one safely? If not, this guide will come in handy.

If you can't get your engine to start running, a spark plug issue could be the culprit. Faulty or malfunctioning spark plugs can prevent your engine from doing its job correctly (or at all), so ...

The spark plug is essentially a high-voltage “bridge” that ignites gas vapors inside your engine and makes your car go. On average, spark plugs should be replaced every 50-100,000 miles—the good news ...

Start by searching for a small cylindrical metal object sticking out of the engine. Chances are it’ll be on one side. This is the spark plug. Look for a fairly thick wire at the end of the spark plug.