So I have been messing around with data logging today and trying to get the truck to run better. Each change seems to improve it, but I am still not where I need to be. I am getting a surging. Happens at idle and holding a constant speed. But under throttle it seems to do ok. The surging has crazy swings on the AF Ratio, more toward the lean side. Bouncing between 12 and 18+. BLM is showing they are slightly off like 140 range so each time I have gone out. I have updated tunes with these small changes, but the surge is not improving.
Any thoughts on what I am missing?
Is it just still too lean?