SAFC Hi/Low settings is all airflow signal, it's based on Hz. That's all your compensating. Low is 0-125 Hz, Mid is 125-175 Hz and High is 175 and everything above.
Have you tried clearing the old Timing and Fuel trim maps off the ECU? What happens when you try adding fuel to the rev range it starts breaking up at? Is the ecu responding to your input and giving you back timing and lowering knock when you add fuel in High Thrttle Settings?
I can only tell you that incomplete combustion, unmetered air disturbance, saturation or starvation of air or fuel, and or electrical signal, wiring can lead to problems aswell.
Have you pulled the plugs to see if they're fouled or to see what color they are?
Any advise as to what the problem could be or how to adjust the SAFC to compensate?
Start all over again with the base AFC.
Set Low first het the car to settle around 100% while watching your logger. Do the same for midrange. And then for High as log as it keeps giving you timing and not knocking keep giving it fuel.
Check the basic stuff, and start off with 0 correction and low throttle point at 20% and high at 80% start all over again with the low and STFT, do midrange, and go back to high and see where that gets you. You should be able to dump mounds of fuel in there, enough to flood it and kill it, so maybe it's your logger or 02's are on the fritz. Tuning can be frustrating, you have to stay with it though.
Beer's on me Greg
Cheers
Bookmarks