Oxygen Sensors Rb25 To 26

[skylinekid]

hey everyone im currently puttin a rb26 into a gtst and im using the 25 harness.... is basically the same except for knock sensor plugs.... in regard to using one single 02 sensor im unsure if i could use the rb25 sensor and it will compute properly with the 26 computer.... unsure if they are the same band width as such.

thye different i see is the plug and the wires are different coulours 25= white red black 26= white white black apart from that does neone know if it would work thnx

and yes im aware i will have to splice wires since im running single turbo setup..

[paulr33]

different 02 sensors (type) and wiring

depending on what ECU you use, if you use an rb25 ECU, youll need to use a single rb25 02 sensor

or you can just leave it out and have no 02 feedback, the car should still work and run fine (just crap fuel economy)

[skylinekid]

thnx paul im running an apexi power fc d-jetro

[Adriano]

thnx paul im running an apexi power fc d-jetro

If its a djetro, it will be looking for 2 rb26 o2 sensors anyway, so there shouldnt be a problem

[R31Nismoid]

Dont even bother.

Just turn them off via the Hand Controller, no need for them anyway.

I ran mine without for years, no problem.

I've only got a set in there now for the EPA so it doesnt flash a fault light via ECU codes/consult etc.

[skylinekid]

yes but i want fuel economy aswell...... so says paul earlier....

and like i said i would bridge the wires for the 2 02 sensor inputs on computer.... shouldnt be to hard.....

[Adriano]

As i said, if its a djetro, then it will have two o2 sensor inputs, as its made for an rb26, not rb25. And tuned correctly, you will geet better fuel economy with the o2 turned off

[skylinekid]

but just for shits and giggle i want the 02 sensor in there and functionable neways..... i have been doing sum reasearch and according to a couple of ppl the gtr sensor when the car is started the internal heater is on until car is hot then heater is turned off.... gtst sensor heater is constantly on also i have been told sum of the gtr sensor came with 4 wires not 3.... so yeh got me stumped for the minute lol

and as i said earlier i would just bridge the 2 inputs so i can get a reading for both and just even it out but yeh im aware thats its not needed for tuning with power fc.

the main thing i need to know is if i can or cant use the 25 sensor to a 26 computer thats my only issue

Edited May 10, 2008 by skylinekid

[paulr33]

you cant use RB26 02 sensors on RB25 ecu

you cant use RB25 02 sensor on RB26 ecu

[Adriano]

Simple, use 1 rb26 o2 sensor, and bridge it into the two inputs at the ecu

[skylinekid]

on closer inspection i have noticed that the 2 sensors for rb26 have to different plugs hence to not cofuse fron turbo with rear turbo sensors id say. the good thing is the 2nd sensor has the same connector as the rb25 so it will just be plug and play. but i will double check its functioning and not just hope it is lol. thnx for all the help guys much appreciated.

[Adriano]

Still a bit confused by the problem, if you have 2 o2 sensors, why dont you just use them both, and wire it up the way it is from the factory

[skylinekid]

Still a bit confused by the problem, if you have 2 o2 sensors, why dont you just use them both, and wire it up the way it is from the factory

bcuz 1 sensor for one turbo ya dont need 2 plus i dont wanna have to run more wiring capeesch