I don't have the stock maf. I had the ford performance maf which was working. Then my tune got corrupted and at the time I thought my maf was bad. So I bought the SCT BA3000 to replace it. Installed and had the exact same issue. Could the wiring for the maf be bad. I inspected the terminal and wiring an all seems good.no, the o2 is only for feedback.
I would suspect the MAF sensor at this point, do you have a stocker to put in for testing?