Wideband question
 

I purchased a UEgo for my car and I was wondering is it possible to run this sensor in place of my stock sensor? Sorry if this has been talked about before, but I searched for hours and could not find a definitive answer. I have a 99 so I am wondering which wires would I have to tap in my stock o2 connection line. I have read this may clear up my idle as seen here
http://forum.miata.net/vb/showthread...band+stock+ECU
thanks for any help:)

Not sure about the AEM specifically, but wideband O2 controllers generally have a 0-5V output that you can wire to a gauge and a 0-1V narrowband simulator output that can be wired to the ECU in place of the stock O2 sensor.

Have you found the 0-1V output?

No I haven't, I have not even started the install, I was just wondering if I would benefit from connecting it to my ECU other than just running to my gauge. I am the wideband to help me monitor/manage my WI once installed:)

K, well, your first question, can it be done? I'd be surprised if it couldn't.

Next question, should it be done? Hmm, when I ran the NB simulator from my PLX, it worked out well. Idle settled down, and the gas mileage increased.

that is exactly the results I am looking for but I am unsure how to hook it up. My turbo set up is running fine with the exception of my gas consumption and my crazy idle.

The AEM does not have a 0-1v output for narrowband sensors, it cannot emulate your narrowband. Leave your stock narrowband in place in the downpipe, install the wideband further down, weld in an extra bung if needed. AEM recommends 36" from the turbo to keep from overheating the sensor.
I run the stock sensor and my AEM wideband just before where my cat should be. Works perfect, it idles great, and I have normal like stock gas mileage if I stay out of the throttle.

thanks for the info.
I was just wondering, I am still doing fine on my stock ECU with 6 psi & stock injectors!:) I plan on using the AEMWB to help me monitor my WI rates seeing that I can adjust it because I have a progressive set up. Should I run into any problems with this method?

as far as i know there is no change in the AF ration when water methanol sprays . i heard this from a friend but am not sure can someone contradict it?