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
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.
I would inspect plugs and wires on cylinders 2 and 6. and inspect the connector and the wire going to the PCM
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:
Refer to the Powertrain Control/Emissions Diagnosis Manual(Can be purchased as a separate item.) for additional information on spark plug polarity