Tech Feature: What’s New in Spark Plug & Ignition Cable Technology
Ignition systems have changed a great deal in recent years, with coil-on-plug (COP) ignition systems being the most common setup on many late-model engines. Car makers like COP ignition systems for a variety of reasons. The main one is that mounting a small ignition coil over each spark plug gets rid of the troublesome spark plug wires. Plug wires are vulnerable to heat and vibration damage, and can become a source of ignition misfire if they become wet.