Hey there Parsons!
How are you? I'm sorry to hear that you are having so many troubles getting your efie to respond correctly. I tell you what, I have definately been there multiple different times. I can tell you almost for a fact that any vehicle from about the year 2005+ will need to have all of the other circuits addressed as well! I would start with lowering your lean-out limits. Meaning you would need to apply resistance to your iat, and ect circuits to gain more operating room for tuning for the ecu. Every ecu, or pcm has limits, that it won't go past, but by adjusting these two sensors first, I am certain you will have a lot easier time getting the gains you want. Also address either your maf/map sensor to lock in your gains for good. ALso are you 100% sure that you have the correct wires for your signal wires on your o2 sensors. This is the biggest and first mistake that most users come across. Also make sure you have the wires hooked up on correct spot on your efie. If you have any more questions or comments..i'm more than happy to help.