Ignition Leads

Ignition Leads

Ignition leads, also known as spark plug wires or high tension leads, are an essential component of a vehicle's ignition system. They are responsible for transmitting the high voltage electrical current from the ignition coil to the spark plugs, which in turn ignite the fuel mixture in the engine's combustion chamber. Ignition leads are typically made of a conductive core, usually made of copper or other metals, which is surrounded by an insulating layer to prevent electrical leakage and interference. The function of ignition leads is critical to the proper functioning of the engine. If the leads are damaged, corroded, or worn, they can cause misfires, rough idling, and poor fuel economy. In extreme cases, a faulty ignition lead can cause the engine to stall or fail to start altogether. Therefore, it is important to periodically inspect and replace the ignition leads as part of routine maintenance. There are different types of ignition leads available, including OEM (original equipment manufacturer) and aftermarket options. OEM leads are designed to meet the specifications of the vehicle manufacturer and are typically more expensive. Aftermarket leads, on the other hand, may offer better performance or durability, but may not be compatible with all vehicles. In summary, ignition leads are an essential component of a vehicle's ignition system, responsible for transmitting the high voltage electrical current from the ignition coil to the spark plugs. They are critical to the proper functioning of the engine and should be inspected and replaced as part of routine maintenance.

spark plug wires, high tension leads, conductive core, insulating layer, misfires

— Christopher Jackson

CITATION : "Christopher Jackson. 'Ignition Leads.' Design+Encyclopedia. https://design-encyclopedia.com/define/ignition-leads?E=353700 (Accessed on October 14, 2026)"