Help with innovate lc-2 wideband install stock ecu
 

Hi all from the uk I'm looking for some infoon installing the innovate lc-2 wideband kit this is the one I have I can't find any info about using this kit with the stock ecu my car is a 1991 1.6 thanks in advance https://www.miataturbo.net/attachmen...ine=1465458430

With a stock ecu I would just leave the stock ecu and stock o2 as they are. And just use the wideband as a monitor. The instructions should give hints on how to wire it, such as a switched 12v and a ground.

I Don't understand what's not understood about "stand alone wideband".

keep the factory o2 sensor, and weld another bung for the wideband sensor, and just connect the controller to a switched power source, done.

I don't want it as a stand alone wideband hence the reason why I asked the question TO USE WITH THE STANDARD ECU

Most people don't have good luck with a 0-1V emulated Wideband for the stock ECU. It's possible that the Mazda narrowband isn't calibrated the same as most widebands that have a narrowband output. As others said, it'll be less trouble to just weld in a second bung.

It says in the instructions exactly how to hook everything up. My friend has one. Just follow those.

In ither words, RTFM.

Worked perfectly in my car for the one day I ran the stock ECU with my AEM UEGO. It bobbled between 14.3 and 15.3 any time it was in closed loop.

I have a 1990 with a single wire O2 sensor though.

Another reason to install a 2nd bung is that supposedly wideband sensors don't tolerate heat well, and live longer lives further downstream.

To the OP, just use it as a standalone, unless you have some reason that you have to use one o2 sensor, but I can't think of any reason that would make sense.

I ran an lc1 as my only O2 sensor hooked to my stock ecu for a few years with my ms1 in parallel. Never had issues with it.

I have watched the broke and boosted videos on youtube and he has it as the only O2 sensor wired to the stock ecu and I'm going the same route with my car budget until I can get a ms2

See what you have done @1993z32. This is why we cant have nice things.

Aidandj you can still have nice things they just don't have to cost the earth:)

I replaced the stock O2 sensor in my -97 NA with an Innovate LC-2 kit (Bosch 4.9 sensor, an analog gauge) in preparation for the impending MS3 install. Not welding in a new bung in stock exhaust, but I'll mount it further down when I build the turbo stuff later. Install was a piece of cake, the only problem was getting the stock sensor out (which worked when the exhaust was hot, I only burned myself twice). I mounted it behind the glovebox (behind/above the air duct plastic thing), ziptied up to the wiring harness.

I just spliced the "narrowband" output signal from the LC-2 into the stock harness and also fed it power from the ECU +12V wire (via a small fuse). Works like a charm and the values shown on the gauge look perfectly sane. I didn't bother with all the cables to the gauge though. It has a "permanent +12V" lead that I just didn't connect (as well as leaving the backlight power off), but it still works fine. I guess that is if I want to set custom limits for the AFR "alarm" to have them be remembered forever.

What colour wire is the narrowband on the lc-2

You could try looking at the install directions that came with your lc-2. They say in there how to wire and what color is narrowband simulation.

Didn't get any instructions with it and the dowload pdf from there site doesn't say whi ch is which

Page 3 of the PDF tells you what wire is what. It took me about 45 seconds to find the pdf online and figure out which wire is configured for what.

3. Optionally, the YELLOW (Analog out 1) and/or BROWN (Analog out
2) can be connected to the analog inputs of other devices such as
data loggers, aftermarket programmable ECUs, or AFR display
gauges. If either one or both of these wires are not being used,
isolate and tape the wire(s) in an out of the way location. Each of
the two analog output wires can connect to one device that can
accept this 0-5v potential output.

45 seconds well at least your internet speed is ok now for the same question which wire is the narrowband which needs conecting to the stock 02 plug

"The default analog outputs are as follows: Analog output one (yellow) is 0V = 7.35 AFR and 5V = 22.39 AFR. Analog output two (brown) is 1.1V = 14 AFR and .1V = 15 AFR."

Literally the paragraph below what you posted in the instructions.

So the brown wire to the stock ecu