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Can you have different TM for normal and performance mode? I'd like to keep a fair amount of TM in normal mode and a lot less in performance mode.

Did you follow this guide?
http://www.g8board.com/forums/showthread.php?t=35770

Your O2's are probably bad. I had a similar problem. The STFT would max out after about 20 minutes
of driving and the wideband would be at about 10-1 even though the computer was commanding stoich

here's the tune

I swapped out my bosch O2's for some Denso's and everything is working
like it's supposed to. If you start running a little rich and goes way rich
intermittently, it's probably your O2's.

I'm still experimenting but I've got it working a lot better than it was.
Modifying the axis made a big differance

I've never tried it but it says for drivetrain braking but it might only work in manual mode.
Trans>auto shift properties>general>TUTD>mountain mode

Have you tried mountain mode?

Hopefully some one can look at my scan and give me some ideas as to why
my STFT's max out after a 20 minute drive. The car runs great then after 20
min my AFR gauge goes to 10. I forgot to hook...

I've swapped the drive train and instrument cluster from a 08 Pontiac G8 into a different car.
I need to be able to disable the secondary fuel level sensor and recalibrate the primary for
my fuel...