I emailed Varak and he said this:
"There were two shorts in the main wiring harness leading to the coil for the 3rd cylinder. It took awhile for them to find it, but fixing the shorts solved the problem.
I was initially irked at the price, but then learned that a new wiring harness is over $700 for the part alone, so guess I shouldn't complain too much."
Seems I remember someone else having shorts in the wiring harness to the coil packs.