I had my buddy ride around and collected a data mode log. I am trying to figure out how to use the o2 inputs to help with the tuning. The values for the front and rear sensors are in mV. What determines lean or rich? Also, what is the o2 integrator reading? I know they are not wide band o2s but figured they could still be used to assist with the tuning. Thanks, Brian

 

I just starting to using SERT but have done some tuning with Holley's EFI. So here's some general info on narrow band O2s. They will output between 200-700 milVolt when reading a 14.7:1 A/F. So anything under 200mV is lean and anything over 700mV is rich. Since they are narrow band its unlikely you will see a steady voltage if it bounces between 200-700 when cruising your close. If its always <100mV (Lean) or >900mV (Rich) then you need to adjust. Also it is improtant to know that the O2 sensors are only used during cruising.

The intergrator is how much the injector pluse is modified (100% is OPEN LOOP or no adjustment needed...running at table values) 110% more fuel 90% less fuel it should bounce around 100% +/- 15. You can also compare "New VE" and "VE" values to see how close your table values are. I found it best to focus on one cyclinder at a time.

Hope this helps and I'm by no means a SERT expert so if someone knows more don't be afraid to correct me or add more info.

Has anyone found the "Closed Loop Bias Table" mentioned on page 3 of the manual???

 

Look at your integrators and look at your new VE. When you see the integrator above 100, the new VE will be greater than your existing one and vice versa. Go through and enter the new ve's in place of your existing ve's. Also, take your entire bias table and max it out. That will give you a target a/f of approximately 14.2:1 in all the closed loop areas.