When logging the PLX at some parts in the log it is measuring a constant AFR when sitting on a set throttle % but in other parts of the log it will cycle up and down from 16:1 to 14:1 under a similer throttle condition. was just wondering if this is normal, and was thinking that maybe the 12V power suply to the PLX module is not constant and in turn is causing this problem, would it help to wire in a 12V to 12V dc power regulator to give a constant 12V supply to the module.