O2 Sensor Reading Shows 2.80

[SkyKC]

Hi

My car is r33 GTS4 NON-TURBO, though I have a Apexi pen style turbo timer with O2 sensor reading, which shows 2.80 and keep changing all the time. The maximum reading I have seen is 2.80.

whats the normal reading should be?

Should it be on one value without changing?

if this si problem from where can I buy a o2 sensor?

I have no Idea where to find the o2 sensor in my car, a little hel please...

Cheers

Chinthana

[ignuz]

  SkyKC said:

Hi

My car is r33 GTS4 NON-TURBO, though I have a Apexi pen style turbo timer with O2 sensor reading, which shows 2.80 and keep changing all the time. The maximum reading I have seen is 2.80.

whats the normal reading should be?

Should it be on one value without changing?

if this si problem from where can I buy a o2 sensor?

I have no Idea where to find the o2 sensor in my car, a little hel please...

Cheers

Chinthana

Maybe it has something to do with the lack of a turbo..?

[Eug]

o2 sensor can be bought from an SAu trader (kudosmotorsports, or Michael Sullivan). NTK one for about $120ish.

an o2 sensor basically measures the air/fuel mixtures from exhaust gases.

the sensor is located on the exhaust manifold/headers/extractors... (see attached pic for a rough idea on where to look in your engine bay). takes about 5 minutes to change, and is a piece of cake.

not sure on how apexi get their readings, but if you're running rich or lean then it should be quite obvious. nothing a retune/dyno time can't fix.

[SkyKC]

  Eug said:

o2 sensor can be bought from an SAu trader (kudosmotorsports, or Michael Sullivan). NTK one for about $120ish.

an o2 sensor basically measures the air/fuel mixtures from exhaust gases.

the sensor is located on the exhaust manifold/headers/extractors... (see attached pic for a rough idea on where to look in your engine bay). takes about 5 minutes to change, and is a piece of cake.

not sure on how apexi get their readings, but if you're running rich or lean then it should be quite obvious. nothing a retune/dyno time can't fix.

Thanks for that, Ill have alook in my car tomorrow. maybe clean it up a bit and see. So in my understanding, O2 sensor doesnt effect the performance of the car? I will be doing a tuneup maybe a dyno soon. but that not going to change anything . as long as this is not something i should consider, im happy.

Cheers

[Eug]

no.. the o2 sensor does affect performance!!

it tells the ecu how much fuel and air to put in when you put your foot down.

[SkyKC]

  Eug said:

no.. the o2 sensor does affect performance!!

it tells the ecu how much fuel and air to put in when you put your foot down.

How do I know my o2 sensor is stuffed or not. at the moment my car doesnt have much power at all, last week did a servise with oil change and spak plugs to NGK irridium. cant feel any difference though. I have a Apexi SAFC as well, dont know how to tune it. my be chnaging the o2 sensor and tuning the safs might help?

Cheers

[Eug]

let your car run and take a quick smell of the exhaust gases, and if it smells really fuel'y (basically like when you're at the petrol station) it's probably running rich. hard to describe...

if you have an SAFC in with the standard maps, then you aren't running at ideal mixtures.

Changing the O2 sensor and SAFC tune is a must.

o2 sensors would generally need to be changed considering most skylines are most probably nearing 80,000-100,000km.

[SkyKC]

  Eug said:

let your car run and take a quick smell of the exhaust gases, and if it smells really fuel'y (basically like when you're at the petrol station) it's probably running rich. hard to describe...

if you have an SAFC in with the standard maps, then you aren't running at ideal mixtures.

Changing the O2 sensor and SAFC tune is a must.

o2 sensors would generally need to be changed considering most skylines are most probably nearing 80,000-100,000km.

Smell is not really fuel's, probably car is not tuned properly, when you say tuning the safs actually what they do? is it hard to do? i went to a place and they said it will cost $500 just to tune it....

any help? (Imnot sure about when you say "Standerd maps" i can write down the values wich I can see in the safs if it helps)

Cheers

Chinthana

[Eug]

having it tuned will fine tune the air and fuel mixtures for optimal settings.

$500 including dyno time is about right.

writing down the values won't mean anything... each car is different

no one can really help you... it sounds like you lack alot of the basic fundamentals in how an ecu/piggyback management works.

just get it tuned... it's not doing anything just sitting there. simple as that.

[SkyKC]

  Eug said:

having it tuned will fine tune the air and fuel mixtures for optimal settings.

$500 including dyno time is about right.

writing down the values won't mean anything... each car is different

no one can really help you... it sounds like you lack alot of the basic fundamentals in how an ecu/piggyback management works.

just get it tuned... it's not doing anything just sitting there. simple as that.

Yeah I get it, thanks for the advise , will let you know how it goes after tuneup...

Cheers

Chinthana

[SkyKC]

Checked with NGK for an o2 sensor, they have o2 sensor for 33 RB25DET engine, not for RB25DE which is my one:(,,,,,so there much difference when it comes to oxy sensor between trubo and non turbo? if not then I can buy the one for RB25DET and fit it in to my RB25DE car (r33 GTS4) please advise.

Cheers

[MBS206]

Stock O2 sensor is only a narrowband. It can only tell the ECU when you're around stoichiometric so at full throttle etc (loaded up) the ECU runs in open loop.

[Cubes]

When are you looking at it? When the motor is cold?

I bought a genuine nissan o2 sensor. When cold it reads 3.98v then within a km or 2 it slowly drops down to the 0.20-0.9v and begins cycling back and forth as it should. It begins cycling once the engine temp reaches over 40degree's.

[SkyKC]

  Cubes said:

When are you looking at it? When the motor is cold?

I bought a genuine nissan o2 sensor. When cold it reads 3.98v then within a km or 2 it slowly drops down to the 0.20-0.9v and begins cycling back and forth as it should. It begins cycling once the engine temp reaches over 40degree's.

When the motor is in operating temp...........