Ignition System

IGNITION SYSTEM

Component Locations:

Component Locations

Coil-On-Plug Ignition System - 6.8L Engine Shown, 5.4L Engine Similar:

Coil-On-Plug Ignition System - 6.8L Engine Shown, 5.4L Engine Similar

The 4.6L, 5.4L and 6.8L engines are equipped with a coil-on-plug ignition system. Rather than a remotely mounted coil with secondary ignition wires, this system has a separate ignition coil mounted on each spark plug. Operation of the coils is controlled by the Powertrain Control Module (PCM), which computes ignition timing based on inputs from engine sensors.