I've reached out to Jon and he's responded. They are really backed up with work at the moment, so I don't know how long the car would be down there.
Had been hoping that I could find an interim tech up here to take care of the car should it need it.
No one in my area does EcuTek for the 370z. Closest place is RAD in Long Island
Real Auto Dynamics - Home
A hassel to get there for me ... and having to flat bed it is ex$pensive.
Some of my issues aren't Tune Related so I've got to get them taken care of first before anything else.
One of them sounds very much like your TB issue --- going flat and losing power.
It also stalled in the middle of a car wash and wouldn't start again for over an hour.
I'll be reaching out to Jon again within a few days. Am having the oil changed and checking the filter for break in debris.
Had expected some tweaks being needed early on after the build.
Much Thanks for your input ...