While I am waiting for my next dyno tune / test session (this Wednesday) to verify 1.625" headers are better than 1.750" headers for my rebuilt 2.8L engine, I started wondering about procuring replacement parts for my X-Faktory CIS to ITB EFI option #2 conversion kit. I sent an email to Al Kosmal asking him where I could buy a replacement O2 sensor for my system when the need arises. Al pointed me to the 14pont7.com website and while there I saw under "Latest News" an article about maximizing accuracy (see photos).
Here is an excerpt of the calibration process from the article:
So after reading the above article, I decided to try performing the calibration procedure on my system.
I downloaded the Excel calibration worksheet. I started TunerStudio on my notebook and connected the serial / USB cable from the MegaSquirt2 ECU to my notebook, then I turned the ignition key to the "ON" position (key ON, engine OFF) and observed the Air Fuel Ratio gauge on TunerStudio - initially it read "13.20", then after 5 seconds it read "16.60". Then I entered the observed values above into the Excel calibration worksheet and the worksheet computed the Point 1 and Point 2 AFR values.
Then in TunerStudio from "Tools", I selected "Un/Lock calibrations" and unlocked calibrations then clicked on "Burn".
Then from "Tools", I selected "Calibrate AFR Table...". For "EGO Sensor", I selected "Custom Linear WB", then I input the Point 1 and Point 2 AFR values from the Excel calibration worksheet. When the values were entered, I selected "Write to Controller" then "Close".
Then from "Un/Lock calibrations" I locked calibrations then clicked on "Burn".
Then I shut down TunerStudio and disconnected the cable from the ECU.