7875 + 5.9 + E85 + Megasquirt
Here's a log of when i hit 11psi. You can see where the afr dips to 10.1. The EGO correction looks like it's taking away fuel but it's configured to only adjust 25% so it may not be able to take enough away. What my tuner said may make sense as well. Some other factor is influencing this because the same tune (VE table and AFR) was working fine a few weeks ago and never went this far rich. I just got some fresh E85 and measured it and it's E85 on the dot. I have a fuel pressure gauge but it would be better if I was inputting that fp into the MS so I could log it and see exactly what it is at different boost levels. Those were the two variables my tuner thought might be at play; fuel pressure and E85 mix.