I have a S4 TII with S-AFC 1 wired off the boost sensor instead of TPS.

I am going to unplug my O2 sensor so it doesn't go into closed loop so the S-AFC controls the mixture at all times (others have done this). I saw in another thread that people were thinking of grounding out the sensor wire once it is unplugged.

Anyone done this yet if so what happened?

thanks
ed

 

I don't see any harm in trying it.
It may not prevent a check light, but you will be the first to know for sure.