Spark Plug Wire, What Are They For?

They are essential in order to create the best spark in the spark plug. Keep in mind that the ignition system works at high pressure, somewhere between 10.000 and 30.000 volts.

Regarding ignition wire failures they can manifest themselves in several ways. The main problem is that they do not carry the necessary current to obtain a good spark, which can lead to engine vibrations, higher pollution levels and consumption due to poor combustion or traction.