Ignition Cable: Service and Repair

REMOVAL

CAUTION: Do not pull on ignition wire directly, the wire may separate from the connector inside the boot.

Spark Plug Wire Remover:

1. When removing ignition wires from spark plugs, use Spark Plug Wire Remover T74P-6666-A. Grasp and twist the spark plug boot back and forth on the spark plug insulator to free the ignition wire spark plug boot. Use the special tool or equivalent to pull the boot from the spark plug.

CAUTION: Do not pull on ignition wire directly, the wire may separate from the connector inside the boot.

2. When removing ignition wires from the ignition coil, squeeze the locking tabs of the ignition coil wire retainer and remove using a twisting and pulling motion.

INSTALLATION

CAUTION: Proper installation of ignition wires is critical to vehicle operation. If any ignition wire is not properly installed on spark plug or ignition coil, both spark plugs connected to that ignition coil may not operate under load.

1. Whenever an ignition wire is removed from a spark plug or ignition coil, or a new ignition wire is installed, coat the entire interior surface of the boot with Silicone Dielectric Compound D7AZ-19A331-A (Motorcraft WA-10) or equivalent meeting Ford specification ESE-M1C171-A with a small clean tool prior to installation.

Ignition Wiring Routing:

2. Install each ignition wire on the proper ignition coil terminal per the Ignition Wiring Routing illustration. The engine cylinder numbers are identified on the ignition coil. Ensure that the ignition coil wire boots are fully seated and that both ignition coil boot retainer locking tabs have engaged.
3. Remove ignition wire separators from ignition wire set and install ignition wire separators in same relative position on the new ignition wire set. Install ignition wires and ignition wire separators on the engine.
4. Connect ignition wires to proper spark plugs.