One thing to keep in mind is that the MAF sensor is very delicate. Here's a link to a good article on cleaning it:
How to Clean MAF-2005 5.4 - F150online Forums You might ask yourself how you did it and try to decide if it might have been damaged.
Otherwise, DO try driving in stock (or at Level 1 tranny only if you still have that tune) to see if the code repeats. You can leave the Gryphon plugged in of course when at stock.
- Jack
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