The PN 9002C wires (not pictured) offer a lesser angle for mild-angle applications. These 8mm Ferro-Spiral core wires with ceramic spark plug boots can withstand up to 2,000-degrees F.

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.

If the boot doesn’t give easily, you can use a spark plug wire puller, which can be found at the auto parts store. 5. Replace one spark plug at a time.

The “boot” is what connects the ignition coil to the spark plug. It is similar to a spark plug wire but isn’t visible. Over time, the rubber deteriorates and loses its insulation quality.