Well, I've not seen B0145 set to anything but 1 at the 80% cell (except on the Northstar engine), this is why it's not mentioned in the tutorial, but, that doesn't mean someone didn't fiddle, or you have an odd one there with it zero'd from GM.

I'm not doubting you had issues, but how did you determine it wasn't using B3670? Did you try something similar to what I suggested?

Cheers,
Ross