Your first purchase in assembling your collection of spark plug removal tools: a set of standard spark plug wire pliers. These grab the spark plug wire boot straight on or from the side. They feature ...

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.

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 ...