Home › Forums › Stay Dirty Lounge › Service and Repair Questions Answered Here › MAF FUBAR? › Reply To: MAF FUBAR? October 22, 2020 at 9:02 am #986798 Dave TidmanParticipant Did you get any codes? I would think with a bad MAF you would either get a rich or lean code. Have you tried unplugging the MAF to see if that smootheds it out? Not sure about subarus, but a lot of ECMs will put in a substituted value if the MAF is unplugged.