GM fitted the affected vehicles with redesigned spark plug wire retainers. The exact terminal construction varies depending on the use of the spark plug. Champion is an American brand of spark plug. It produces a rising voltage that is sent to the spark plug. The combustion timing is controlled by the flame from the spark plug. Lenoir is generally credited with the invention of the spark plug. There it is aimed at the spark plug area and ignited. Again, it is ignited with a spark plug. A modern single-spark system has one coil per spark plug. The inspections confirmed the previous conclusion that the artifact was a 1920s-era Champion spark plug. It is also used to make spark plug insulators. The spark plug caps had ignition coils built into them. And there is a Spark Plug play on the road. Vettel eventually finished fifth, as Hamilton inherited victory after a spark plug failure for Leclerc. The iron-containing deposits formed from ferrocene can form a conductive coating on spark plug surfaces.