Jump to content
SAU Community

O2 Voltages In Gtr

Pal

By Pal,
in Engines & Forced Induction

 Share

Recommended Posts

Pal Veteran

Pal

Posted
Posted

hey guys

just replaced my o2 sensors but from what ive read, i think something maybe wrong. o2-1 reads a .8 to .9v at idle. o2-2 sits on .06v. ive given it a bit of a rev and they both move but i would think they should be the same voltage.?? i used the rb25 (NTK OZA395-E2) *2 with plug modification

Link to comment
https://www.sau.com.au/forums/topic/350894-o2-voltages-in-gtr/
Share on other sites
rob82 Mentor

rob82

Posted
Posted

hey guys

just replaced my o2 sensors but from what ive read, i think something maybe wrong. o2-1 reads a .8 to .9v at idle. o2-2 sits on .06v. ive given it a bit of a rev and they both move but i would think they should be the same voltage.?? i used the rb25 (NTK OZA395-E2) *2 with plug modification

GTR's trim the front 3 and the rear 3 cylinders independantly so they will neverread the same while in closed loop.

Moodles2 Grand Master

Moodles2

Posted
Posted

I'm not sure if I would trust either's voltage output, when fully warming up at idle you should see 0.4-0.6v.. but if they are indeed working then the first 3 cylinders are running rich (assuming o2-1 is the front sensor), while the last 3 are running lean

rob82 Mentor

rob82

Posted
Posted

They will only really trim once its hot and on cruise. Try bringing the revs up to 2500rpm hot and see what you get - if one goes lean and the other rich - then you have most likely wired them around the wrong way (the best check is to watch the fuel trims as you will see one go to full positive trim(25%) and the other to full negative trim(25%)). ie front 02 signal in the rear dump and rear 02 sensor in the front dump.

Pal Veteran

Pal

Posted
  • Author
Posted

just give it a rev to 2500. 02-1 sits on .9 to 1 v. o2-1 sits on .08 to .09.

checked the wiring, long plug goes to back, square plug goes to front (can someone confirm this please)

wires are in correct positions(same color wires go to heaters and same to signal wire across to plugs)

where do i see the fuel trims?? had a look in the screen for o2's and couldnt see them there

Pal Veteran

Pal

Posted
  • Author
Posted

just went through my pfc screens and it turns out the o2 f/b control was turned off. there is another one, 02 sensor reg. does this need to be turned on too? must be a gtr thing cause i cant find it in any manuals

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • Duncan
      Looking for a part number for this part here

      By Duncan · Posted

      So....to find any R chassis part number, get your VIN (will be something like ER33-xxxxxx for you) and go to: https://www.amayama.com/en/genuine-catalogs/nissan and enter it. From there you have access to a web version of Nissan's part system, FAST. It is a bit tricky to get used to, so maybe have a shot and post up what you think.  You can also search by general model but note in some cases your car might have different options so VIN is safest.  On diagram 211 I got 14075-75T16 for Connector, Water Hose If I search for part 14053‑21U10 that you posted, that is also a water hose but not the one bolted to the plenum and 14075‑04U00 is the fitting where the water hose goes into the block.
    • Duncan
      Duncan's V37.......race car?

      By Duncan · Posted

      Yeah now we are talking I much prefer coolers in the front middle because it lessens the chance of a small bump to a corner stopping the whole event. I was thinking the AT cooler can move out of the radiator, delete the AT/engine coolant interwarmer and mount a separate cooler with a thermoswitch somewhere further back as is common in racing, that would be one thing. Beyond that, the engine oil cooler is an obvious one to move to the wheel arch, potentially one on each side, but unused space is an issue. I did have a earlier pic with the bumper off but it doesn't show how busy the corners are: DS is full of the auto driving sensors and PS is totally fully of windscreen washer fluid reservoir But ultimately I was hoping to keep the AC, and the water/air heat exchanger is fundamental so it is not just the radiator that needs to be in front BTW here's airflow to the rad as it ran at the track (one horn is gone now and I'll remove the lights next time):
    • turboedsloth
      New Wasteland Wa Topic

      By turboedsloth · Posted

    • V35_Paul
      Infiniti Q60 Navigation Update

      By V35_Paul · Posted

      your right the maps for Australia came out in 2017 but are 2010 maps. i got the updated maps SD card put it in and it was the same. Same maps in my Brothers Nissan Patrol. 2020 i think his car is
    • silviaz
      Returning after a long time!

      By silviaz · Posted

      Yeahhhh, the costs have killed me. Spent more than the cost of an engine rebuild and it most mostly servicing and a tune lol.
×
×
  • Create New...