Front Oxygen sensor STI V9

[Niklas Adolfsson]

Hi,

I am trying to get use for the front lamda sensor with a Link G4 PNP for my JDM STI V9. On a JDM it sits right after the twinscroll turbo.

I have been reading the manual and clicking around in PCLink, but I cant find that it is used? I only see its possible to activate the rear sensor.

The signal comes to B84:29 on the contacts for the ECU and heater signal is on B84:4 or 5. I have measured and the ecu doesnt send out any signals with the PNP installed.

Want to use it for closed loop lambda. What AN Channel should I choose?

Maybe its as easy as plugging the front lambda contact into the rear contactsupply and activate it?

[Jurgen Biggelaar]

Hi Niklas.

You are correct that the front one does not go to the ECU header at all.  We believe this sensor to be next to pointless to tune off so left this out of the equation.  The likelyhood of the Link making sense of this sensor is also not high given we would not have a calibration for this sensor either.

Jurgen

[Jurgen Biggelaar]

Hi Niklas.

I believe the Subaru sensors act as a quasi wide band (in short not the real thing).  I am not sure how you would make that work for you.  My understanding is the AFR/Lambda correction it is not going to really work with it.  I know that if you used an LC-1 or NGK AFX wide band kit or the likes, then it would work just fine.  You really want something that can output 0-5v in relation to O2.

Jurgen