Got a PM suggesting the higher fuel pressure might be an issue.

Which got me thinking, and looking back at the logs. It doesn't seem to find stoich at idle at all, which is the same VE value as light cruise at 2000rpm. As the PM'r suggested, it might not be able to run a low enough PW at such low fuel requirements.

Since I changed to an external aftermarket fuel pressure regulator that can be vacuum referenced, I think I'm going to hook it the vacuum and see if that can help me actually run with lower VE values at the bottom of the table.

I seem to recall reading of people having issues tuning with a vacuum referenced fuel pressure regulator, so I need to do some research to see what the issues are.