Car performance is more than simply the ability of a motor vehicle to succeed in top speeds to make sharp turns; in addition, it is due to the suitable performance of its components. It is the hundreds of car parts, from the smallest screws and spark plugs on the big tires, working together in harmony that defines car performance. It is these parts that enable motorists to experience the exhilaration of driving or riding in a well-maintained vehicle. Many people with an anxiety disorder do not realize they have a defined, treatable disorder and so anxiety disorders are thought to be underdiagnosed conditions. (Take our anxiety disorder test) Next to contact breaker, spark plug is among the most weakest part of the ignition system. It is mounted within the combustion chamber from the engine, where working conditions are- severe. During peak combustion conditions the temperature inside the combustion chamber in the modern car engine may be around 2500 ºC and the pressure about 7 Mpa. Moreover a spark plug can also be exposed to thermal and load cycling fatigue on account of sudden changes in temperature and pressure-from the high temperature of burnt gas on the relatively low temperature with the air/fuel mixture and from the ruthless during the time of explosion from the air/fuel mixture to low pressure during induction. In addition, the spark plug needs to endure high voltage, mechanical vibration along with the corrosive atmosphere of combustion gages. A modern spark plug posseses an economical life of about 10,000-16,000 km.