Ignition device on Car The Spark Plug in Ford Crown Victoria vehicles aims at initiating combustion of the air-fuel mixture inside the combustion chamber of the engine. It works by using electrical energy from the ignition system to produce a spark which is used to ignite a mixture of fuel and air, which drives the engines pistons. The spark plug normally comprises of a metal case, central electrode and a ceramic insulating material and the material used can be nickel alloy, platinum or iridium that determines the efficiency and durability of the spark plug. Copper/nickel, platinum, double platinum and iridium plugging have been used in Crown Victoria models at various times throughout the years. Each type is characterized by the different bullet-resistance, and the operating temperature range - platinum and iridium plugs are more durable in service, and do not cause significant carbon deposits as the copper/nickel ones. The selection of spark plug is crucial to the effects and to prevent some problems in the engine such as misfires or poor take-off, so it must be changed according to carmaker advice.
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