Your spark plugs and ignition wires/coils are a critical combustion event and timing component to your engine. As the protruding electrode produces spark in the combustion chamber, it can wear down with use causing the gap between the electrode and shell to lengthen. After enough dead space is created, the plug will be delayed in its spark which can cause a misfire or timing issue that affects performance and fuel economy. Has your car been running or idling rough? Does it not have the power that it used to? Let Phil’s investigate and keep your vehicle running the way it was designed.