I searched for this and found a couple posts, but just want to be sure...I have Stage 1 PCM, and will be getting the UEGO in a week. I'm wondering where to put the new sensor---after the cat (still have stock 02 housing and cat) i/e the "second" 02 sensor, as it's no longer monitored by Stage 1? Is this correct?

 

correct!

 

it will still throw a code if the downstream is not heated...and placing the wideband sensor after the cat will give you false readings.

 

heat doesn't matter but it does have to stay pluged up to the wire harness so just unscrew it from the cat and tie it up out of the way. The readings are fine because its not really after the cat its right at the front of it. You should get 14.7 at idle.