I am using a portable LM-1 Wideband to measure AFR. The o2 sensor is mounted on my helex test pipe. There is a "L" shaped bung coming off the test pipe. I want to know if i will see an accurate measurement with the o2 mounted there. At idle im seeing 14.7. At WOT in 3rd and 4th im seeing 10.3-10.4 at shift points about 7200. Question how do i match the recording off of my LM-1 with the serial port atttached to my laptop and mittsulogger? The car has been flashed but there is obviously something wrong with these afr or my wideband. Mods in sig.

 

Your O2 sensor needs to be "in" the exhaust stream to be accurate. The bung you are talking about is for your factory rear O2 sensor to help eliminate the code for you cat being removed.

 

I spoke to innovative they said it should be fine. However I feel like Evo owners know the car much better then a customer service rep.