The Spark Plug Wire in a Nissan Frontier transmits high voltage from the ignition coil or distributor to each spark plug so a spark occurs when the current jumps the spark plug gap. The wire consists of a conductive core that is insulated with silicone or EPDM and reinforced with fiberglass braid and finally covered in a heat resistant outer jacket. Each end of the Spark Plug Wire has a metal terminal that snaps onto either the spark plug or the coil or distributor, and the junction is covered by a molded boot for a secure fit. The Spark Plug Wire in the Frontier designs is designed to deliver energy while limiting electromagnetic and radio frequency interference that can affect onboard electronics. The Spark Plug Wire can be damaged by heat, abrasion, and chemicals. This can increase resistance, which will crack the insulation. As a result, hard starts, misfire, rough idle, slower acceleration, and higher fuel use can occur. When these take place, it means replacement is due. The proper length and care with routing ensure that this Nissan part stays clear of hot areas. It allows the Spark Plug Wire's ignition system to work reliably while extending Nissan performance with every Frontier.
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