From what I read, the sensors look fine. Maybe I'm in the market for a new cat? Maybe all the years running it lean with the KN burned it out? Actually, it looks like the output from the second sensor is perfect, meaning the cat is doing it's job. Does that look right?

 

I cleared the code.

 

I have a 99 4runner SR5 2wd Cali spec with 2 cats. is ther any way I can get rid of one of them? maybe remount the sensor behind the second cat and put it behind the fist one.

 

When I did my 3.4 conversion, I decided to get myself the Auto Engenuity OBD II scanning tool for my IBM laptop. Although my laptop has both serial and USB ports, I opted for the USB scan tool, since the serial is going the way of the Dodo.

I haven't had call to use the tool, much, as of yet, but it does seem to have a lot of very nice features to it. It's pretty wild to hook it up, with the computer in the passenger seat, and see the real-time feedback coming up on the screen.

This is the one I got:



And this is where I got it:

http://www.autoenginuity.com/index.html