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The valves were walnut blasted when the valve stem seals were done.. that was part of what the "regional engineer" had asked the dealer to perform on the car and is listed in the 10 page thesis of what they did..
The idle might be vaccum related, I'm going to try and find out of there are any leaks. There isn't a lull when I accelerate but the weirdest thing I heard the car do was in granny mode (Comfort and D) high gear low RPM (around 1200RPM or so) in a neighborhood with walls, I could literally hear what I would call as engine knocking. I would have thought there are enough sensors in the car to tell the car to downshift..but sadly no.. so I make it a point not to try and coast or move at under 1500 RPM by ensuring i'm in a lower gear..
Anyways, back to the original issue, yeah, I'm thinking its either vacuum related or even the vanos solenoid maybe?
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