I was attempting to re-ask the same question Chris asked. Keith, what pump are you using.
I'm using the pump that came with my car when I bought it as a donor. I thought it was stock but I can't say for sure. It appeared to me when I first opened the tank that it did not look like a 125k filter so the pump may have been replaced. If it's not the problem, it's due anyways just for peace of mind along with any other time limited parts. It's possible something going on in my pump could explain the weird AFRs I saw on the dyno as well.
It's definitely fuel path related and not electrically related since it is at very precise but different fuel levels on different tracks doing different things. What really surprises me is that it is only one corner on each course and nowhere else but very bad at those 2 spots. The conditions are just right that it passes a big bubble through the system where it never did before.
What's also a bit frustrating is that it's hard to duplicate. I can't exactly go drive it around the block taking corners at 70 mph in various ways.