Pinpoint Test JB: Secondary Ignition (COP): Introduction
WARNING: This page is about a different variant/trim than selected.
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