Ill check that! ^^^^ could a shitty sensor read good on the gauge and bad in TS?

EDIT: mtx L only has analog wideband output. thats how I read the directions anyway. they dont ever even mention a narrow band anything.

Do you have a general engine settings page, it should have lag factors for map, rpm, lambada and more.

With my digital (reverant/mtx_l) wideband interface I get pure gibberish unless I use 10 for a lag factor instead of the default 50. The gauge will read true, the MS not so much...

It's a long shot, but what the hell.

What he said too. I still think narrowband setting.

Again, the TS gauge just sits still on 11 regardless of engine speed, then just randomly spins around like its possessed. Then when I turn the engine off, it goes to 19. I'm stumped.

Ill try this too!

That sounds like the behavior I'm used to, but that don't mean much.

But to clarify, the wire colors on the MTX_L output are useless if the gauge has been purchased second hand.

From the factory it is yellow=WB, brown=sim.NB

There's a data cable though, and software called LM programmer. You can write a narrowband voltage curve to the yellow wire, and the gauge will continue showing true wideband readings. The yellow wire is no longer wideband, it's whatever custom curve the PO programmed.

That's why Aidan is talking voltages and stuff.

Again, the WB is the same one I purchased brand new, that worked flawlessly for two years with my ms2. Every problem I have encountered in the last month, has had to do with this ms3, in one way or another. I am so burnt out on this thing. I feel like I'm one more wasted weekend from selling it all.

I hate that after building this car for a year straight, I am being brought to my knees by an electrical issue. One that I am certain, that a more experienced person could figure out.

Is there anything in the ms itself, that could fail and cause such a problem?

No, shouldn't be. It's a pretty basic voltage comparison circuit I imagine, not a lot to go wrong.

You could open it and follow the o2 terminal on the board, make sure it's going to the same db-whatever pin you've got it wired to on the other side. For it to read 11 and 19 means it's reading in the middle of the range you've programmed, something is happening.

I'd also go back into the wideband config in Tunerstudio and change it to LC1, just to be sure you've got the proper volt/afr curve.

I used the default volt/afr settings that Brain suggested, along with what mtxl says to use. I have also tried every Innovate WB choice in TS, just to see. I've learned to not post here without exhausting every other option.

Have you tried reading the voltage of the WB signal going into your MS?
One thing that's crazy about this problem is that going from 11 to 19 is pretty much what the reading of a narrowband sensor does, but if the brown NB output of the gauge were hooked up, it would put out .1-1.1V, so the AFR would only jump from ~7 to ~12 (with the LC1 calibration).
Could there be a problem with the O2 circuit somewhere? There would be some problems if it were grounded or connected strangely.

New findings! I am getting .5 volts fed into the O2 sensor signal wire, only when connected to the MS. Harness only, clean open line.Connect to MS with key OFF, .5 volts. WTF? how can this be?

EDIT. Now it seams that I have intermittent interference, or my meter cant be trusted. Excellent.

voltage from the O2 sensor seams right. comparing voltage to sensor signal to my mtx gauge reading, it makes sense. Tuner studio gauge is just wacky. The crazy part, is that if I set TS to narrow band, I get a somewhat believable reading. how is this possible??? I have every aspect of the the tune set to read wideband.

For the most accurate reading, you'll want to use the sensor ground in the MS. Probably a bit overkill, but good practice.
It could be hooked up for narrowband, .5 is right in the center of its reading and it'll drop to .1v when it reads lean (like when the engine's off)
I'd check the voltage with the engine running too.
https://www.miataturbo.net/megasquir...bration-73818/
double-check your wiring, this guy had his mtx hooked up to the output2 (narrowband) and it was acting just like yours.

oh, didn't see your post there, are you getting a reading above 2V?

Ill check the voltage while running, but....I have literally checked every connection, continuity, voltage and setting more than ten times.. this is what I have.


Problem- TS gauge does not agree with wideband gauge.

- All settings in TS, including project properties are set to read Wideband.

-TS WB setting is set to custom linear .22v=7.35 5v=22.36 (or something close to that)

- Wideband voltage on signal wire agrees with actual gauge reading.

-I am connected to the YELLOW wire on the WB signal output. this is the wideband analog output as stated in the MTX manual.

-If WB gauge reads 20, TS says 7.9 (or there about) this was with the engine off, after running, that's why the 20 on the gauge.

-If i set TS to Narrow band, it almost matches up the two gauges.

- This is the same gauge and wire connections that I had used problem free on my MS2.

Thoughts?

yes

Well if you're getting 0-5v on the gauge's output, it's pretty safe to say it's a MS problem. Looking at the MS schematics, it looks like it's pretty much just a filter, some over voltage protection and then it goes straight to the CPU. If the resistor value for R10 is too large, it could lower your readings, but putting the wrong part in there seems like a long shot. The spec is 1k Ohms, so you could find and check that. Like I said though, longshot. What about firmware? Is that up to date and compatible with everything?

I'm taking the ms apart now to look and see. Yes all of the firmware is up to date.