Pinpoint Test JB: Secondary Ignition (COP): Introduction

WARNING: This page does not describe the selected car, but rather 32 other vehicles, including the 2005 Mercury Sable, 2005 Mercury Mountaineer, 2005 Mercury Monterey, 2005 Mercury Montego, and 2005 Mercury Mariner. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION: A malfunctioning ignition system may cause high catalyst temperatures. Check components next to the catalyst and muffler for heat damage.

This pinpoint test is intended to diagnose the following:

Spark plugs (12405).

Secondary side of the coil.

Vehicle	Firing Order for Coil On Plug Applications
BASE, 4-cylinder applications	1 3 4 2
Escape 3.0L, LS 3.0L, Taurus 3.0L 4V, Sable 3.0L 4V, Five Hundred, Freestyle, Mariner, Montego	1 4 2 5 3 6
LS 3.9L, Thunderbird	1 5 4 2 6 3 7 8
BASE, 8-cylinder applications	1 3 7 2 6 5 4 8
BASE, 10-cylinder applications	1 6 5 10 2 7 3 8 4 9