A question for Nissanfanatic

[1WheelWonder]

When you replaced your factory o2 sensor with the o2 included with the plx m-300, which or what wire on the car did you use to connect the gray wire on the m-300 too. Any information will be appreciated.

[Import_Ant]

on the S13 DOHC wiring harness the O2 sensor shows as only having 1 wire. that is pin 13 on the ECU and it's white. The PLx-300 has two analog outputs, the white and the gray wire but since the ECU only has input for one, I'd treat the gray wire as an auxiliary. hopefully you'll get a reply soon but I don't see anywhere to connect it (I am guessing they provide more than one in case you want to run a narrowband input to a standalone or piggyback so you dont have to use one wire for multiple items.

if you're running an S14 or S13 SOHC let me know I'll dig up the FSM for that car to verif the o2 sensor wire color at the ECU.

[1WheelWonder]

It is a s13, thanks Import_Ant.

[Import_Ant]

here's the link to the FSM for 91-94 240sx's. good to have it's about 22Meg i believe.

http://carfiche.com/manz/Nissan_240SX_91-94.zip

[nissanfanatic]

I soldered it to my stock O2 wire.

[Jookmasta]

thats what i was thinking, y bother deal with going near the ecu harness when the wire that u need to tap into is already extended into the engine bay. just makes more sense to tap it there as to messing or trying to track down the wire among the masses.

[Import_Ant]

depending upon the location of the wideband box it might be closer and more direct to wire at the ECU.

[1WheelWonder]

Sorry it took so long to reply, thanks everyone.

[nissanfanatic]

The M-300 display is on the wideband converter. My "box" sits right on my steering column. It is more direct to run the gray wire to the stock 02 wire and just solder the two together.

[Import_Ant]

The M-300 display is on the wideband converter. My "box" sits right on my steering column. It is more direct to run the gray wire to the stock 02 wire and just solder the two together.

good deal. where did you run the white wire too out of curiousity?

[nissanfanatic]

Taped it off.