u/DeliveryEntire5766

Bought this truck in 2019 with the swap already done and tuning already done but the ecm shit the bed and i lost my tune, i have a new ecm flashed for the truck but everyone I’ve talked to tells me the the 5.9 ecm wont fire the 6.7 injectors correctly even though i have put 70k on this truck with the exact set up.

Anyone out there that can tell me why exactly a 5.9 ecm shouldn’t be able to run a 6.7 injector??