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 What are the Symptoms of Bad Spark Plugs? Tom Kadlec Kia 5 Symptoms of Bad Spark Plugs CARFAX