Have got problem with different values of AFR in aem uego wideband with Bosch LSU 4.2. There is afr 14,3 on the aem gauge while idle, but in tunerstudio (MS2 from Rev) there is afr 14,7.

While in boost, there is afr 12.0 in aem uego gauge, but in tunerstudio it is AFR 13.2 at the same time. How it si possible? MS2 is connected with white output cable from aem uego gauge (0-5V), how it is possible that values are not the same?

 

calibrate the afr signal in megasquirt

 

Because your wideband talks to the megasquirt with an analog signal which is susceptible to ground offset issues.

Analog wideband signals are for noobs. Buy a tinyox or reverant digital wideband box and it will for certain match 100% of the time. The only other option is straight out trying **** at random. Grounding the wideband at specific spots is not a 100% solution, did not work for me at all. The voltage offset is not linear, there is no way to have it perfect for cruise, in boost, and at idle. The AFR/voltage range is just too large.