An ignition coil takes voltage from the battery and multiplies it to create a spark at the spark plugs, which in turn ignites the engine. Cars have been using some form of the coil ignition system for ...

In this video, I’ll show you exactly how to test your BMW spark plugs, ignition coils, and coil wiring without needing a multimeter—just using the kit provided. Whether it’s a misfire, bad coil packs, ...

For something that's everywhere, but can't normally be seen, electricity is pretty amazing. It can produce light, heat, and something that's important to most of us: it can jump an air gap in a ...