E 150 V8-4.6L SOHC VIN W (2004)
Ignition Coil: Technical Service Bulletins
Ignition System - Coil-On-Plug Misfire Diagnostic Tips
TSB 05-22-8
11/14/05
WDS COP KIT DIAGNOSTIC TIPS - COIL ON PLUG
(COP) IGNITION SYSTEMS - ENGINE MISFIRE OR
ROUGH RUNNING
FORD:
1996-1999 Taurus SHO
1998-2006 Crown Victoria, Mustang
2000 Taurus
2002-2005 Thunderbird
2003-2006 Focus
2004-2006 Taurus
2005-2006 Five Hundred, Freestyle
1997-2006 E-Series, Expedition, F-150
1999-2006 F-Super Duty
2000-2005 Excursion, F-53
2001-2006 Escape
2002-2005 Explorer
2005-2006 Escape Hybrid
LINCOLN:
1997-1998 Mark VIII
1998-2002 Continental
1998-2006 Town Car
2000-2006 LS
1998-2006 Navigator
2002-2003 Blackwood
2003-2005 Aviator
MERCURY:
1998-2006 Grand Marquis
2000 Sable
2004-2005 Sable
2005-2006 Montego
2002-2005 Mountaineer
2005-2006 Mariner
2006 Mariner Hybrid
This article supersedes TSB 04-16-01 to update the vehicle applications and model years.
NOTE
FOLLOW THIS TSB PROCEDURE ONLY IF THERE ARE NO SPECIFIC MISFIRE TSBs/SSMs RELEASED FOR THE VEHICLE
SYMPTOM BEING EXPERIENCED.
ISSUE
Approximately 50% of coil on plug (COP) coils returned for warranty do not have a problem.
ACTION
The misfiring cylinder must be identified through Self-Test misfire codes or through WDS Power Balance. Rule out base engine problems, rule out fuel
problems, and then look at ignition problems (be sure to rule out coil primary circuit issues). Once the above steps have been completed, and the issue is
in the secondary part of the ignition system, the oscilloscope procedure outlined in this TSB can isolate the difference between a coil or spark plug
problem.
SERVICE PROCEDURE
The optional WDS COP Kit available through Rotunda will provide more accurate diagnosis and help reduce replacement of non-defective parts. The
Kit (418-F5528) can be purchased through 1-800-ROTUNDA.
The following material will detail the diagnostic steps on WDS to take the guesswork out of misfire diagnosis using the COP Kit. The following
procedure is for cylinder specific misfires and not random misfires. Random misfires have a different root cause and are not covered by this TSB.
