02 Sensor Swap Information

OK, thanx. I'm still working on getting the bung out of the 88 elbow. It's in there! A little more PB stuff and back to the 1/2" air wrench. It'll be for nothing if I can't get the bung out of the 84 elbow now in the car… Well, I ran a diagnostic in mode three and sure enough it now has a code 33 (exhaust gas circuit open) as well as a 42 from befor which was the fuel temp sens. Niether one seems to be affecting the runability…lots of power…no pinging or knock. I think I'll check my milage the next time I fill up. It was getting close to 25mpg befor the swap w the turbo frozen up! If it's still in that range or better I don't think I'll worry about it if I can't get the bung out unless it's going to hurt something.....anyone with info about THAT?

^ ban this fucking bot

Hey can anyone give me an answer, im really confused. I have a 85na and i just put the turbo on and i have an 87t ecu with a 87t o2 sensor. They both have three wires but my stock o2 sensor had a red white and black wire while my new one has two white and a black. Which wires go where? Someone please help me out I've been trying to figure this stuff out all day.

Hey, I have tried looking for this info, but I have not seen a direct answer yet…

I'm wondering if anyone has tested the voltage output from the titania sensors. Since the sensor is given 1v, and will vary resistance, does the ecu read the affected voltage after resistance, or the resistance value of the sensor?

If the ecu is reading the affected voltage after resistance, that would lead me to believe the output is still a 0-1v signal.
We would then need to see how the resistance/voltage is affected with a/f ratios, and if it matches the zirconia sensors.

What I'm really trying to find out is if the ecu is still just looking for the 0-1v signal for both types of sensors. If it is voltage based after resistance for the titania, it will allow us to use the analog narrowband output from an aftermarket wideband kit (and also use zirconia O2 sensors when swapping ecu/sensors if desired).

I'm hoping to do so with my 86, just got the NA2T swap done with ecu and turbo from another 86 (thanks to Tony's Garage in Cedar Park, Texas). I have the Prosport Evo series wideband kit, I would like to try the analog output with the 86T ecu (titania). I'm not looking for a "it will not work" answer. I just want to know if anyone has read the voltage output from the sensors, and which way they are affected with a/f ratios (0~1v when lean/rich, which way the voltage changes for given afr, and for which sensor).

Thanks in advance!

I've been looking at the wiring diagram, on an 85 na going to 87t ecu… It looks like the yellow pin 115 and black pin 36 are identical. The only change appears to be in L in the 85, which after tracing it looks to go to the fuel pump. On the 87t diagram the L wire at the o2 is now a G/w wire that runs to pin 34, sharing the ignition coil now instead of fuel pump