Ignition coil failure

As far as other possible causes you could have a bad spark plug injector wiring or engine computerWithout knowing what was tested or done it's hard to say.

Your welcome glad I could help you out

WARRANTY INFORMATION
WARRANTY STATUS: Eligible Under Provisions Of New Vehicle Limited Warranty Coverage And Emissions Warranty Coverage.
IMPORTANT:Warranty coverage limits/policies are not altered by a TSB. Warranty coverage limits are determined by the identified causal part..

3.0L ENGINE MIL ON WITH DTCS P0351 THROUGH P0356 - MULTIPLE COIL PRIMARY CIRCUIT
TECHNICAL SERVICE BULLETIN
Reference Number(s): 09-2-6, Date of Issue: February 9, 2009
FORD:2005-2006 Escape
MERCURY:2005-2006 Mariner
Superceded Bulletin(s): 05-11-1, Date of Issue: June 13, 2005
Related Ref Number(s): 05-11-1, 09-2-6
ARTICLE BEGINNING
ISSUE
NOTE:This article supersedes TSB 05-11-1 to update the Service Procedure and Part List.

Some 2005-2006 Escape/Mariner vehicles equipped with a 3.0L engine, may exhibit a malfunction indicator lamp (MIL) on with two or more diagnostic trouble codes (DTCs) for coil on plug (COP) primary circuit faults (P0351 through P0356). This may be due to the spark plugs causing RF interference with the powertrain control module (PCM), resulting in damage to the PCM and COPs.
ACTION
Refer to the following Service Procedure to correct the condition.
SERVICE PROCEDURE
Connect the Ford Integrated Diagnostic System (IDS) service tool to the data link connector (DLC). Identify the vehicle and perform a key on engine running (KOER) test.
If only one (1) coil circuit primary DTC (P035x) is present, follow Procedure A.
If there are two (2) or more coil circuit primary DTCs (P035x-P035x), follow Procedure B.
PROCEDURE A
Remove any spark plug and inspect for a 2-digit date code (Fig. 1). If the date code is not present, replace all six (6) spark plugs.
Continue with normal Powertrain Controls/Emissions Diagnosis (PC/ED) diagnostics for the DTC.
Fig. 1: Date Code On Spark Plug

PROCEDURE B
Remove any spark plug and inspect for a 2-digit date code (Fig. 1). If the date code is not present, replace all six (6) spark plugs.
Replace all six (6) COPs.
Check PCM internal coil driver functionality by running the Oscilloscope Escape PCM Driver Test available on IDS version B58 or later.
Using IDS select
Toolbox.
Oscilloscope tools.
Escape PCM Driver Test - follow on screen instructions.
NOTE:THE OSCILLOSCOPE TEST TO CHECK PCM INTERNAL COIL DRIVER FUNCTIONALITY MUST BE PERFORMED PRIOR TO REPLACING THE PCM.

Replace PCM only if coil driver funcionality fails in the oscilloscope test.
Program the passive anti-theft system (PATS) keys if PCM is replaced.
If the procedure has not corrected the condition, follow normal PC/ED diagnostics for DTC.

Hi Marty,

The price quoted is about right for a shop. At the shop you will be paying about $150 - $200 per Coil and about $12 - $16 per plug plus the labor.

If you feel you can do the job you can purchase the Coils for about $70 - $90 each and the plug for about $5 - $8 each. Also you should use the OE (Original Equipment) or OEE (Original Equipment Equivalent) on the plugs.

.

Is it showing a check engine light?

If so, a popular auto parts store most likely will code it for free

Write down the exact code numbers and return here. Yes, listen to "their" diagnosis. But get the code numbers!

Our '03 escape skipped for a few months before I figured out it was a coil pack

. The check engine light did not come on for me either

I might still be able to help you find the one causing you grief. Should it not show up in a code

Are you sorta a decent diy mechanic.A 3.0l may be a little involved, but not hard. Should it be one of the 3 in the back

Your turn----talk to me 'fore you jump in!

The medic

I alway's advise my customers to replace all coils at the same time. They tend to break down in sequence and your back in the shop every week. I would have all the coils replaced !

Mitchell doesnt say anythign about removing the air intake system to replace the plugs or coils, so without actually seeing it I would say no. But sometimes they are vague as to actual procedures. If it looks lie it would be easier for you to go that route, I would. Sometimes the engineers expect you to get your hands into places they werent meant to fit

Excellent addition to this thread! Please feel free to help out whenever you are on the site :)