Sounds like you got DTC P0306. Was that the only one?
Things that I would do:
*The very next time it does it, I'd stop, pull the #6 plug wire and check for spark. By doing this you will rule out one of two systems, fuel system or ignition system. This will greatly help with troubleshooting. I'll assume that there is no danger of a crack in the plug insulator and no damage to the boot on the plug wire, as well as no damage of any kind on this wire between the plug and coil pack.
Depending on the outcome of the above, a few things I'd consider looking into:
* Carefully inspect the coil pack for hairline cracks which may result in leakage/arcing. Be uber **** in the inspection, the crack, if it exists, need not be wide and long. Usually when this is happening and for a prolonged period of time, there will be visible carbon tracking. Also, moisture often encourages arcing/leakage along the crack.
* Scrutinize the quality of all electrical connections leaving no stone unturned, including the grounding, for injector #6.
*Keep in mind that sometimes a brand new part is a bad part, it's not often but it really does happen. Just keep this idea in your back pocket.
Last edited by CowboyBilly9Mile; 10-26-2011 at 08:55 AM.