I've been having some kind of problem with my downstream O2. The computer is getting a strange signal from it so I was thinking about bypassing it using an O2 sim.

For those wondering, the signal starts at 0.4v and after a few minutes drops by 0.1v until it gets to 0v where it just sits at 0v.

Now I found schematics all over the web on how to build a simple O2 sim and I have the basic electronics background to build it but my question comes from the computer diagram... it lists the O2 as having two signal wires? One for O2 Sensor Hi and one for O2 Sensor Lo. If I were tying in the homebuilt O2 sim... which signal wire would I tap into to feed the false data to the computer? Or would one of those not even work?

 

http://www.fuelgaugecalibrator.com/o...imInternal.jpg


http://www.fuelgaugecalibrator.com/

E-mail him, he can help.