I've been investigating how to enable to built in flex fuel support and toying with the idea of enhancing it to get timing added based on ethanol content. I was hoping for a sanity check.
I BELIEVE:
lc_fac_afu_ratio_conf = 00 (this will enable the sensor)
lc_fac_afu_ratio_man_act = 00 (this will disable the manual e-level in calibration)
It looks like those are the only two things that need to be changed to get the ECU to start reading from a sensor and adjusting mff accordingly.... Is there anything I'm missing? I've read through ALFU a number of times but it's very possible I'm missing something....
EDIT:
c_state_srv_1_pid[N][10] is the bitfield that contains the PID for ethanol content (PID52).
Also, I've an idea for ethanol level based timing, though it relies on some modifications to existing ASW patches that I didn't develop so it's not mine to share. Does anybody have any [high level] insight into adding timing for ethanol? I assume it's either custom ASW or relying on the factory knock detection/correction (since my ASW has NLC_IGSP_H_RON_COR = 0).
This is the basic that is needed yes. There are quite a few other maps which you can activate or change to get some better results with the econtent but they are more related to using the AFU without a sensor.
Patching the ECU is an extra map for the timing increase with E content is very worth while but not essential if you dont mind having various maps to flash on based on E fuel
