An inline spark tester is a convenient tool that allows you to test the spark plug wires’ ability to transmit electricity while the engine is running. You can observe whether or not it produces a ...

A spark plug is a small but important part of an engine. It delivers the spark that ignites the fuel-air mixture, allowing the engine to run smoothly. When a spark plug fails, the engine may misfire, ...

Look at the tip of the removed spark plug. A spark plug should come out of an engine with a central electrode that's got a light gray or brown residue. It should be free from any oily or fluffy black ...