o2 sensor wire

[ready to rebuild]

which wire do i hook up my air fuel ratio gauge to? 93 2.3

[Wicked_Sludge]

de grey one wit de light-blue stripe.

[ready to rebuild]

thanks man it wasnt covered in my manual and was driving me crazy

[majik455]

is it ok to splice into a exsisting one for the computer or would you suggest a seprate o2 sensor. does before or after the cat make a diff?
thanks
Ron

[anupaum]

is it ok to splice into a exsisting one for the computer or would you suggest a seprate o2 sensor. does before or after the cat make a diff?
thanks
Ron

I'd splice it into the existing harness. The only thing an "after cat" O2 sensor will do is verify the function of the converter. If you're using the O2 sensor to adjust your air / fuel ratio, it needs to go in FRONT of the cat.

[Wicked_Sludge]

i disagree.

i would either fork over the cash for a wide-band O2, or not bother with an A/F ratio gauge at all. the factory sensor spends its time cycling from rich to lean, the computer averages the signal to control the long term fuel trim. your gauge wont average the numbers so its just going to reflect the rich-lean-rich-lean cycling of the narrow band O2 sensor every few seconds. its not going to be very especially if your trying to tune the engine after a major power increase.

[anupaum]

i disagree.

With what? The question referred to the placement of the O2 sensor.


i would either fork over the cash for a wide-band O2, or not bother with an A/F ratio gauge at all. the factory sensor spends its time cycling from rich to lean, the computer averages the signal to control the long term fuel trim. your gauge wont average the numbers so its just going to reflect the rich-lean-rich-lean cycling of the narrow band O2 sensor every few seconds. its not going to be very especially if your trying to tune the engine after a major power increase.

I tuned mine quite successfully with a narrow band sensor. When I went to the wide band, a little bit of tweaking here and there was all that was necessary. Tuning wasn't very difficult at all, especially when I had computerized tools to help me develop a good fuel map. Megalog Viewer has the capacity to create customized fuel maps based on data developed from actual driving--it's a poor man's dyno, and it worked really well.

[Wicked_Sludge]

i disagree with splicing into the existing O2, and reccomend getting a seperate, wide-band sensor.

i didnt say you couldnt tune with a narrow band...but as you found out, you cant tune as well as you can with a wide band.

[Yellowsplash]

Just splice in a separate wire off of the output wire of the o2 sensor wiring and run that to your gauge...there is no need for another narrowband sensor to be installed. As said before, a narrowband is more of a switch between lean and rich. While it will show a steady reading at WOT and show you the general area, the lack of accuracy is not worth blowing your motor. If your looking to actually tune your vehicle, you should be looking into a wideband.