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Chris (aka-Moose)
Chris (aka-Moose), Technician
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1998 windstar: with coil packs on #3 keeps failing on cyl..prob 3.8l

Resolved Question:

1998 windstar   problem with coil packs   on #3 keeps failing on cyl 2   what is causing prob      3.8l
Submitted: 9 years ago.
Category: Car
Expert:  Chris (aka-Moose) replied 9 years ago.

Let me get all the facts correct you are on coil pack number 3

Cylinder #2 keeps losing fire

Does it just go dead or does it miss intermitent. Once you have decided the coil pack has failed have you removed the #2 plug wire to see if has any spark.

What is the time frame between these failures. Kave you also replaced the plug each time. Does the plug have a strange appearance internal to the engine or external

Customer: replied 9 years ago.
Reply to Chris (Moose)'s Post: yes pack #3 it does not have spark from #2 wire only notice at low rpm.just got new plugs and wires code says misfire on #2 seems ok under load tho does spark knock excessivly would burn it but just put cash in trans lol work van
Expert:  Chris (aka-Moose) replied 9 years ago.

There is not really anything to cause 3 coils to fail. I recommend you remove the wire from the coil for #2. Check to see if there is a long spark jumping from the coil to the wire. Here are fords possible causes for missfire.

  • Ignition system.
  • Fuel injectors.
  • Fuel pressure.
  • Evaporative Emission System.
  • EVAP canister purge valve.
  • Base engine.
  • Running out of fuel
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    I would inspect plugs and wires on cylinders 2 and 6. and inspect the connector and the wire going to the PCM

    Ignition Coil

     

    The ignition coil (12029) is mounted on the rear of the RH cylinder head (6049) . The ignition coil contains three separate ignition coils. Each ignition coil is controlled by the powertrain control module (PCM) (12A650) through individual coil leads. Each ignition coil activates two spark plugs (12405) simultaneously:

    • One spark plug on the compression stroke; this spark plug uses the majority of the ignition coil's stored energy.
    • One spark plug on the exhaust stroke; this spark plug will use very little of the ignition coil's stored energy.
    • These two spark plugs are connected in series, so the firing voltage of one spark plug will be negative with respect to ground and the other spark plug will be positive with respect to ground.

    Refer to the Powertrain Control/Emissions Diagnosis Manual(Can be purchased as a separate item.) for additional information on spark plug polarity

    graphic

     

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