I’ve got a question about installing the MM3 on a 5th Gen.
Mine is 2021 with a push-button start.
I’m wondering if, when writing the new file to the ECM, the push button needs to be in the Acc or Run position.
I did the stock file first and put it on my computer, then the writing of the ecm, but I had it in the ACC position.
I didn’t see any lights flashing on the instrument cluster like I have when tuning my fords.
The writing of the ecm said it was successful, and I started the truck with no codes.
I’m in the process of removing some weight and want to make sure I did it correctly before starting the truck again after losing some weight.
Thanks.
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