im not at a computer where I can open the tune files in the thread. OP did you leave the screen in the MAF? I may have missed that. I hope you did. You will need to rerun fuel trim adjustments to the MAF curve. Fats355 is dead nuts on. Your going to need to rerun your fuel trim learns on your MAF curve. As far as PE enrichment, I tuned an 8.1 in a g3500 drw bus of all things and found the enrichment ramp in rate was set stupid low. Its like a AFR adder. It slowly adds fuel to the desired PE AFR. But from the discussion id say you have a 2 fold issue right now. Too slow of enrichment rate and the maf curve is off. Disable PE and rerun your maf learns and then lets get back to PE.