i am running a straight pipe and have a question about the o2 sim. i have a 97 v6 camaro (1 pre-cat o2 sensor, and 1 post-cat sensor). i plugged the simulator into the post-cat sensor, now what do i do with the sensor that is before the cat? leave it plugged in or take it out?

 

The sensors before the cats, you leave plugged in and connected.

Thx,
Claude