So I sent a bunch of logs to Jared at UpRev the other day and during my spare time I converted all of my AFR's to excel spreadsheets so I could see what they were doing across the board. This is a 0-90 run and it is concerning me that my right bank is running considerably leaner than my left.



Now it isn't a full point over but in some cases it's 0.5 more. Does this seem normal?

I had came across a post on my350z yesterday (can't find it now) from the middle of 2006. He had basically the same issue so I was wondering, do the VQ's naturally run like this?

I am waiting for my new tune as we speak. This could just be in my head

 

From what I can tell this is normal behavior. O2 sensors have variation in their voltage output. I think A/F targets are global, not bak specific, so I don't believe this type of variation can be tuned out.