Many wideband o2 controllers these days will output a simulated narrowband o2 signal, the purpose of which to supply a signal to a factory ECU so it doesn't freak out if you decided to install the wideband in one of your factory o2 bungs.
So my question: What do you do if you have an ECU that reads two sensors? V6, one sensor at each collector.
Wouldn't you just leave a stock style narrow in one of the banks and run your wide band + narrow outputting O2 on the other?
pres589 wrote: Wouldn't you just leave a stock style narrow in one of the banks and run your wide band + narrow outputting O2 on the other?
I suppose, but i have two concerns with that.
1) How do you know your wideband simulation is calibrated exactly like the stock one on the other bank, to avoid CELs and/or "limp mode?"
2) Then the wideband is only reading one bank.
pres589 wrote: Wouldn't you just leave a stock style narrow in one of the banks and run your wide band + narrow outputting O2 on the other?
That would work fine.
In reply to Swank Force One:
2) You expecting crazy variance between the two banks? Don't overheat that side and I bet it stays about the same, bank to bank.
1) Have you ever seen a narrow band flipping back and forth? I don't think this is going to be a big issue. They work independently and the ECU can deal with that.
In the end you kind of have to just go with it and see what happens. If you get a CEL out of this, well, you go from there. I bet if you took your two-channel o-scope and backprobed the pins on the O2 connectors to watch voltage levels you'd see all kinds of weirdness and things are still fine. Independent swings and voltages going hi/lo at the same time, etc. That's just a guess though. I wouldn't try to overthink this until you have a problem.
pres589 wrote: In reply to Swank Force One: 2) You expecting crazy variance between the two banks? Don't overheat that side and I bet it stays about the same, bank to bank. 1) Have you ever seen a narrow band flipping back and forth? I don't think this is going to be a big issue. They work independently and the ECU can deal with that. In the end you kind of have to just go with it and see what happens. If you get a CEL out of this, well, you go from there. I bet if you took your two-channel o-scope and backprobed the pins on the O2 connectors to watch voltage levels you'd see all kinds of weirdness and things are still fine. Independent swings and voltages going hi/lo at the same time, etc. That's just a guess though. I wouldn't try to overthink this until you have a problem.
Heh, i'm not expecting anything, really.
Yeah, i've seen a narrowband flip back and forth, i've logged what my simulation does on the MX6, it's pretty constant. For that matter, wideband signal oscillates pretty consistently at cruise at almost a 1 point total spread.
This isn't for me, i'm trying to figure out something for a buddy. My V6 car just runs a dual channel wideband controller, problem solved.
We're talking about a JE-ZE powered Miata in this case.
Why not run it off the narrow band, and add a bung for a wideband after the y in the pipe, so you are picking up both sides?
Why not put two widebands and two magic signal cookers?
Why not...uhmmm...try the one wideband on one side, narrow on the other, and see if the thing works ok?
Streetwiseguy wrote: Why not run it off the narrow band, and add a bung for a wideband after the y in the pipe, so you are picking up both sides? Why not put two widebands and two magic signal cookers? Why not...uhmmm...try the one wideband on one side, narrow on the other, and see if the thing works ok?
All valid questions. I'm just trying to cover bases and answer his questions.
I think he's probably making this harder on himself by trying to run this car on a stock ECU at all, and my personal solution would have been Megasquirt, single wbo2 after the Y, and done.
The phrasing of the original question implied that. He just wants to add a gauge or datalogger, or something?
Swank Force One wrote:pres589 wrote: Wouldn't you just leave a stock style narrow in one of the banks and run your wide band + narrow outputting O2 on the other?I suppose, but i have two concerns with that. 1) How do you know your wideband simulation is calibrated exactly like the stock one on the other bank, to avoid CELs and/or "limp mode?" 2) Then the wideband is only reading one bank.
1) pretty much all o2 sensors act the same- and how they run is well known to WB makers- so in terms of a output, it should match quite well. The OBD issues you may (probably) have are basic circuit tests- specifically the heater circuit. So when it's put in, you still need to run the heater lines to the O2 sensor.
2) You can have your buddy move the WB from one bank to the other after playing with the one bank. Being that he's using the original ECU, any bank to bank difference that is inherent to the engine is already built into the calibration. Good to keep in your mind, but not something to worry too much about.
FWIW, if I were to set that up, I would keep the two banks separate.
Streetwiseguy wrote: The phrasing of the original question implied that. He just wants to add a gauge or datalogger, or something?
He's going to try to boost it on the stock ecu. Not something I recommended but at least he knows to get a wideband.
This is for David? I'm suprised he's not on this board.
This is for David? I'm suprised he's not on this board.
Don't think he's a big forum user, but yep it's for him.
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