Diamond & Zebra is a Japanese company that creates advanced ignition systems. It's mostly known for its work on ...

Nope. That just confirms that the spark plug fires in open air. It doesn’t mean the ignition coil is strong enough to fire ...

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, ...