First, let me say that while I've purchased EFILive, I've not yet used it. I bought it (got a combo deal with WB O2 sensor) for an '98 LS1 swap into an old Corvette, but I'm not to the tuning point yet.
I've also got an '02 Yukon with the 5.3l flex fuel fuel engine. I'm getting the P0178 code indicating a potential bad fuel composition sensor. After pricing the sensor ($500ish), I'm wondering two things:
1) Can I tune it so the E85 maps aren't used?
2) When this code is detected, what maps are used? Could I tell by scanning?
It seems to run fine, and I assume that it uses the regular gas maps since E85 isn't too common. OTOH, the E85 needs a richer mixture, so maybe it's safer to default to the E85 tune??