1999 PCED On Board Diagnostics II |
SECTION 5: Pinpoint Tests |
JB: Secondary Ignition Introduction |
JB: Pinpoint Tests ![]() |
This Pinpoint Test is intended to diagnose the following:
Fouled plugs or a damaged ignition may cause high catalyst temperatures. Check components next to the catalyst and muffler for heat damage.


IGNITION COIL TO CYLINDER CORRELATION AND FIRING ORDER— ALL OTHERS
| 4 Cylinder Applications—Except 2.5L Ranger | ||||||||
| Firing Order | 1 | 3 | 4 | 2 | ||||
| Ignition Coil | 1 | 2 | 1 | 2 | ||||
| 4 Cylinder Applications—2.5L Ranger | ||||||||
| Firing Order | 1 | 3 | 4 | 2 | ||||
| Ignition Coil | 1, 3 | 2, 4 | 1, 3 | 2, 4 | ||||
| 6 Cylinder Applications | ||||||||
| Firing Order | 1 | 4 | 2 | 5 | 3 | 6 | ||
| Ignition Coil | 1 | 2 | 3 | 1 | 2 | 3 | ||
| 8 Cylinder Applications | ||||||||
| Firing Order | 1 | 3 | 7 | 2 | 6 | 5 | 4 | 8 |
| Ignition Coil | 1 | 2 | 3 | 4 | 1 | 2 | 3 | 4 |
IGNITION COIL AND FIRING ORDER-COIL ON PLUG APPLICATIONS
| Firing Order for Coil On Plug Ignition. |
|---|
| LS6 |
| 1 4 2 5 3 6 |
| LS8 |
| 1 5 4 2 6 3 7 8 |
| 8 Cylinder Applications - Except 3.4L Taurus SHO |
| 1 3 7 2 6 5 4 8 |
| 8 Cylinder Applications - Taurus SHO |
| 1 5 4 2 6 3 7 8 |
| 10 Cylinder Applications |
| 1 6 5 10 2 7 3 8 4 9 |
JB: Pinpoint Tests ![]() |