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Update:

Thanks for the advice guys, I got it figured out finally.

1. So this may present an issue, I have been using one of the factory O2 bungs for the WB. Afaik it runs like crap in closed loop with only one O2 sensor.

2. Honestly I was too scared to even...

It runs okay. Not great, but not bad.

That's a good point. IDK how it would be getting fresh air though.

I swapped the stock o2 sensor on the driverside with the wideband. I wanted to get an extra bung welded for it, but my welder guy said it was impossible to put one before the cat with the stock...

Which is why I'm confused that the AEM wideband is showing lambda 1.5 when it should be closer to 1.0

What things do I need to log for it to be useful?

Hey Guys, currently new to tuning and to forums. I am working on learning both quickly.

Stats and equipment: 2005 C6 Corvette Z51 stock except for a Vararam intake, HPTuners MPVI 2, AEM wideband...

I'll have to try pin 3! beyond frustrated that there isn't clarification on this haha