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, do spark plugs make a difference in acceleration? if they look like this vs new, don't want to replace this if it doesn't need to be : r MechanicAdvice Your Spark Plug Speaks. Do You Listen? A simple spark plug inspection can reveal a lot about your engine's health. The color and condition of your spark plugs help diagnose fuel What Are Basic Bad Spark Plug Symptoms In A Car? Carorbis What are the Symptoms of Bad Spark Plugs? Tom Kadlec Kia