I am working on an o4 lb7 and efi has been on it for over a year. It only switches from dsp3 to dsp4. Top 2 positions are 4 and bottom 3 are on 3. Voltages are changing but tunes are not. Also getting a bootloader error with no codes on v7..5 when i try to read but i can read and flash with v8. Ive always been able to use v7.5 before and i checked another truck to make sure the software was functioning right and it worked just fine. Any help greatly appreciated.