Automotive spark plug wires are insulated by multiple layers of silicone to prevent sparks from jumping to adjacent wires, causing misfires.
It is also used to make spark plug insulators.
The computer will send a signal to the ignition coil at the indicated time in the timing map in order to fire the spark plug.
However, if the engine was out of tune or if a spark plug became fouled, the shaking overwhelmed the dampening of the mounts.
The extremely high voltage from the coil's secondary (typically 20,000 to 50,000 volts) causes a spark to form across the gap of the spark plug.
A spark plug is said to be hot if it is a better heat insulator, keeping more heat in the tip of the spark plug.
There is no direct relationship between the actual operating temperature of the spark plug and spark voltage.
The exact terminal construction varies depending on the use of the spark plug.
