MOLLY No first prizes for guessing the Focus here SparkRing Your spark plug is basically a health report for your engine. Pull one plug and you can learn a lot, things a scanner wouldn't be able to tell you. Light Let's take a closer look inside your engine's combustion chamberwhere one small component makes a huge difference. Spark plugs may seem simple, but their material and design directly affect your engine's power, Fix vibrations not working for calls, texts, and alerts on iPhone