MicroSquirt.com read only forum (Jan.15,2018)

I am running megasquirt (fuel only) on my 1990 RX-7 with a narrowband O2 sensor. I have gotten it tuned so that its drivable but am unsure about using auto-tune or mega tweak because I can't get a steady O2 signal below 25% throttle (75 MAP). I have headers and the O2 bung is pretty far away from ...