I already opened a help ticket. Has anyone run into this before? I have the 2, 2+, and 3 and I tried using both the regular and beta scanners and no matter what the fuel trims immediately pin negative until the engine dies. Doesn't matter if I put the original ecu back in, still the same thing. I also have an aftermarket Launch x431 scanner for comparison and the fuel trims work perfect and the truck runs great when I connect that scanner. The tune file has not been modified. Here's a datalog showing them just go negative within seconds.

25-06-26 15-31-07.hpl