I've posted this on a couple boards so I can get a decent response...

I just picked up an Innovate LC-1 wideband and I'm having an issue. There are two outputs on it and I'd like to ditch the stock o2 and use one as a simulated o2 for the stock ecm. Herein lies the problem. I'd like to send the wideband signal to the ecm so I can datalog with it. But I saw a post in here about using a small LCD gauge to show output. Can I split the wideband signal with a Y of some sort or just T off the signal wire and send one to the ecm and one to the gauge?

Not being an EE here but I think you can do it.
You need to measure the resistance from the two places you are splitting it to and make them match. If one is lower than the other it may cause problems.
I would try it and see if the measurements are reletivly close.
They should both be high resistance because there is very little current needed on the voltage input to either device.

I am in same situation. i am installing the A/F gauge in a pod on pillar in spring. Car in storage currently so cant look at LM1? You say two outputs. One to gauge. One to ECU. Why do you need three? do you have two NB02's on your car?

Have you posted you Q on the Innovate Forum? Maybe you can send back LM1 to Innovate and have them add another output? Or do they require you by an accessory?

Depends on the input impedance of the gauge you want to use, and the output impedance of the WB.
If the gauge is high, like a DVM, somewhere above 10 megohms, yes. ( called a "bridging" input )
If it's less than about 10X the input impedance of the ECM, then it will affect the reading, causing it to appear lower.
Really, it depends mostly on the output impedance of the WB. The easiest thing to do, is power up the WB, and hang a voltmeter on that wire connected to the ECM. Now, connect your gauge. Did the volts reading change ? If so, it'll cause a false reading. If not, go for it. It's fine.

I've only got one NB O2. But I need three outputs. One NB signal to ECM, one WB signal to ECM for datalogging purposes, and one WB signal to a gauge.

I posted over on the Innovate Forum, I didn't even know there was one.

Is it possible to make the ecm spit out the same voltage it sees on a certain pin? Like have to read the WB signal coming in and have to spit that same signal out on another free pin?

Figured I'd finish this thread off for anyone looking for an answer later.

Talked with Mark (Mangus) at a local gathering a week or so ago and he's suggested that there have been some problems with people using the the simulated NB signal. So with that in mind, and along with not being able to make the ECM spit out the same voltage as it gets as an input, I'm just going to keep the stock NB in the drivers side header and break down to put the WB in the passanger collector so I can program both outputs as WB on the LC1.

Maybe now I'll get around to messing with the fuel. No more 10:1!