Getting used to the (lack of) power delivery of the 328. Still no resolution. Exhaust gas backpressure test revealed no issues. DUH!
They were moving on to checking coils. Plugs looked worn, but not to the point of causing issues.
Missfires in cylinders 4 and 6. I'm guessing bad coils or carbon build up.
For now, I'm putting 100 miles per day on thier car.
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