There's a drop down for e85 in the program. What do you choose for octane.? I'm running a 50/50 mix of 91 and e85 . I chose e85 and 100 octane in the tune. It seems to run pretty good but I'm having a weird fuel pressure problem. For the first few minutes of driving fuel pressure is normal, then it starts to rise. It will bounce from 50 to 80 rapidly and cause a surge. Does this sound like a tuning issue?