sti-spec-a

Can somebody conirm this is the case or not

Before the turbo on the drivers side is an O2 sensor with 3 wires After the turbo is another O2 sensor with 4 wires The extra wire being the heated element
Is this desc correct? ,why are they different and whats the best one to take a output feed from for the AFR meter

Cheers Grant

MarkB1

Take the AFR wire from the white wire near the boost solinoid, but also make sure you earth it back to battery earth, well thats what my instruction said or

http://www.mrtrally.com.au/performance/docs/WRX-V5.pdf

and go to page 33 and it tells you to splice into wire 21 on connector B136.

But again make sure you earth it back to TRUE earth ie battery.