02 sensor

[ItsjustaGT]

So I bought a 90 gt and Im having Idle problems and Ive checked the IAC and the TPS and everything is good. My mechanic said that because I dont have O2 sensors (even places in the exhaust to put them), that may be the issue. My problem is I dont even know where the connections are to put in O2 sensors... Any pictures or some guidance would be greatly appreciated.

[Trojan Horse]

Originally Posted by ItsjustaGT

So I bought a 90 gt and Im having Idle problems and Ive checked the IAC and the TPS and everything is good. My mechanic said that because I dont have O2 sensors (even places in the exhaust to put them), that may be the issue. My problem is I dont even know where the connections are to put in O2 sensors... Any pictures or some guidance would be greatly appreciated.

Yes, the O2 sensors are necessary for the ECU to determine the proper air to fuel ratio.


Hopefully the wiring is still under the car somewhere.
Buy you a Chiltons manual that has the wiring diagrams so you can trace out the wiring, buy the sensors and bungs, weld the bungs into the piping at approximately the 2 O-clock position on the pipes, install and connect the sensors. You may be able to use the O2 sensor extender wiring to connect them. Look on American Muscle for the extenders.

[ItsjustaGT]

Thanks man. I got the car for a great price. It with a great price comes alot of work there are supposed to be two o2 sensors correct? I see quite a bit about WB and NB.

[1fst86]

CPU needs the input from those sensors to correct engine adjustments... Engine can get too rich/lean... Could go boom..

[Trojan Horse]

Originally Posted by ItsjustaGT

Thanks man. I got the car for a great price. It with a great price comes alot of work there are supposed to be two o2 sensors correct? I see quite a bit about WB and NB.

Yes there are two sensors.
What's WB & NB?

[XXSTEVEO66]

Originally Posted by Trojan Horse

Yes there are two sensors.
What's WB & NB?

Uh...wideband & narrow band maybe?..

[dreamstang]

Originally Posted by XXSTEVEO66

Uh...wideband & narrow band maybe?..

I think you are right my friend

[Trojan Horse]

Originally Posted by XXSTEVEO66

Uh...wideband & narrow band maybe?..

Originally Posted by dreamstang

I think you are right my friend

He is I'm sure.
Brain is not working to well just yet.


Narrow Band is what would be on the car.