Well new idle control valve in there and unfortunately no change in behavior. Did go along pulling coil connections to see if I could change behavior, but sound I'm getting is slightly different so I will have to assume no misfire. Plus no codes for that.

Went to the dealer to pick a tech's brain. After giving him symptoms and codes he put into his computer and pulls up a service bulletin for three batches of wiring harnesses. Sent me home with numbers check against my own the Engine wiring harness. Sure enough I have 12517513548, one of these sets on my harness. I remain skeptical that this harness is at fault, though I realize their data points in that direction.

I am a stumped now. Next step I guess is to bring it to my local indy, give him the history and get his take. Up until this point I am the only one that has actually heard and experienced the stalling/misfiring.

Wiring harness looks like a lot of labor and 500 beans for the parts.

Thanks for reading and don't be shy about additional input.