I have tried almost every simulator out there and none of them seem to work on 2nd gens. If you have a first gen I know some people have gotten them to work. But you are correct the 1st o2 sensor does air/fuel and the 2nd monitors the cat.

 

Just extend the poor thing. Some GKs actually have them dangling and they don't get a CEL light along with some RDs that I've heard of. Depends on your car basically tongue.gif You get lucky or you don't.

 

so in reality i dont need the second O2 sensor correct? Im wanting to run a header with NO cats. And if i can get the car to pass emissions (no cel) then im good to go.

 

If you can get the CEL to stay off with no cats, then yes. From what I've read, the Tibby ECU is a weasel when it comes to these things. Smart little sucker.

 

<div class='quotetop'>QUOTE (Patreezy)</div><div class='quotemain'>j/k man,

what's with this 10 character requirement to post? oh well, now I have more than 10...</div>

Keeps people from postwhoring with one or two letter replies.