Wideband o2 question??

[NJMAZDASPEED]

I have done some homework and finally found out how a wideband o2 sensor works, but i 'm still trying to figure out if its is something we can use in our cars. Can we just switch out our o2 sensor for a wideband and if so will that leave our cars constantly running in closed loop(which should bypass the crappy fuel maps that we have )??

[mattybo]

I have done some homework and finally found out how a wideband o2 sensor works, but i 'm still trying to figure out if its is something we can use in our cars. Can we just switch out our o2 sensor for a wideband and if so will that leave our cars constantly running in closed loop(which should bypass the crappy fuel maps that we have )??

I was always under the impression that the wideband O2 sensor was just there to recognize a percentage of how much unburnt air to fuel was coming out of your exhaust...i didnt think it would help with any fuel mapping. If you check out AEM's UEGO wideband kit, it comes with the sensor and a gauge that actually has a digital readout and the LED in one gauge. Basically it will give you an accurate reading. Will it also affect our ECU?

[NJMAZDASPEED]

From what i can gather, there are stand alone and fuel management systems that use them for fuel mapping, but if im wrong please correct me.

[KyRaceFan]

it wont affect the a/f ratio or the ecu.. just tells you exactly what it is.

[jersey_emt]

It could work but you would need a wideband sensor that also has a narrowband output.

Wideband range is 0-5 volts
Narrowband range is 0-1 volts

So you can't just place a wideband sensor in...it wouldn't work.

Usually the narrowband output is on the display module. So you would have to wire the narrowband output to the PCM.

[njaremka]

To get the full benefit from a wide band, you will need to convert to a full stand alone ECU that can recognise the signal it produces. Stock ECU will not recognise the signal from a wide band.

[NJMAZDASPEED]

Is there any other way of running our cars in a constant closed loop??

[mattybo]

To get the full benefit from a wide band, you will need to convert to a full stand alone ECU that can recognise the signal it produces. Stock ECU will not recognise the signal from a wide band.

I dont think the AEM UEGO would need to have a full stand alone. I think it is just a package that will "accurately" disply your a/f ratio instead of the BS an autometer gives you. That way you would see your correct a/f ratio after upping or lowering boost, as well as after other modifications. This would be a good addition in the sense that you wouldnt have to strap up to a dyno w/ a wideband everytime you wanna make sure your stoich.

[jersey_emt]

I dont think the AEM UEGO would need to have a full stand alone. I think it is just a package that will "accurately" disply your a/f ratio instead of the BS an autometer gives you. That way you would see your correct a/f ratio after upping or lowering boost, as well as after other modifications. This would be a good addition in the sense that you wouldnt have to strap up to a dyno w/ a wideband everytime you wanna make sure your stoich.

Exactly. You don't need a standalone to use a wideband. But you should have a wideband to use a standalone :)

You CAN replace the stock sensor with a wideband sensor, you just have to make sure that the PCM still sees the narrowband range of 0-1 volts.

[YP5 Toronto]

Wideband 02 Sensors WITH the gauge/datalogger are primarily meant for reading and/or logging A/F data.

These devices can not be used to influence or change the operation of a stock ECU.

You can still use one and for many of you that are upping the boost and removing fuel cut feature..... it is a must (IMO). You can monitor your A/F ratios and see how rich or how lean you are running. You can then gauge what PSI is "right" for your car.

This along with an EGT can communicate what is going on with your car. Those of you going crazy on the boost.....get a wideband and/or an EGT.

[Sixmil]

From what I understand the AEM Wideband can also output a narrowband signal to the ECI. I have one on order, so Ill be able tell you for sure in a week or so.


-Six

[njaremka]

These devices can not be used to influence or change the operation of a stock ECU.


That's more of what I meant to say.

[jersey_emt]

From what I understand the AEM Wideband can also output a narrowband signal to the ECI. I have one on order, so Ill be able tell you for sure in a week or so.


-Six

Most wideband setups can do this. And it is required if you want to simply replace the stock sensor with a wideband sensor.

[mattybo]

Most wideband setups can do this. And it is required if you want to simply replace the stock sensor with a wideband sensor.

Good good, once i get most of my mods done and im ready to start working on cranking up the boost, im gonna have to buy one of these. Our cars are so different you could be stoich at 7.5 (someone has posted that they are at a perfect 12 at 7.5 psi) or you could be stoich at higher levels. I dont feel like bringing my car down to agile auto and spending 85 bucks everytime i want to find out.

Why not invest the money now and be able to have a perfectly accurate way to measure your afr, that way if you decide to get real crazy and mess with internals/top end/fuel system you will have an accurate reading. That way you dont blow your engine...or take years off its life.