O2 Sensor/Lambda Wide band

theodd001 · Post by **theodd001** » Thu Jan 21, 2010 11:45 pm

I was wondering if there are any benefits to or if it is even possible/necessary to run with both an O2 sensor and a lambda sensor. My exhaust has 2 bungs already welded into place and I have a P72 ECU with S300 installed...?

FreshDA9 · Post by **FreshDA9** » Fri Jan 22, 2010 6:44 am

when tuning you need a wideband to make your corrections. you can not have the 02 sensor on (closed loop) while tuning. After you have made your corrections to A/F then you can turn your 02 back on and adjust some of your short and long fuel trims.

theodd001 · Post by **theodd001** » Sat Jan 23, 2010 3:18 am

It won't hurt having them both installed and having the lambda sensor hooked up to the s300?

theodd001 · Post by **theodd001** » Sat Jan 23, 2010 3:21 am

I guess I'm asking if the sensors will conflict with each other while operating normally, does one get disabled?

FreshDA9 · Post by **FreshDA9** » Sat Jan 23, 2010 8:00 am

you can install both yes. but only 1 will run at once. you need to have the wideband while you tune. after tuning you can turn the stock 02 back on if you wish. your wideband does not calibrate the tune for you, you have to tune it manually. but its also there so you can see the gauge while driving to make sure there is no problems.

theodd001 · Post by **theodd001** » Sat Jan 23, 2010 12:07 pm

10-4, roger roger, copy that! Thanks!

theodd001 · Post by **theodd001** » Mon Feb 08, 2010 3:10 am

Another question on this... if I just have the lambda wideband installed will it act as the stock O2 sensor in closed loop?

fly_n · Post by **fly_n** » Mon Feb 08, 2010 6:01 am

It depends what your set-up is...

What WB unit are u using?
Does it have facilities to simulate a narrowband signal?
If it does,can it output both WB & NB signals at the same time?

How do u have the WB unit connected to the ECU?
Do u have a single connection onto the D14 input pin, or,do u have 2 seperate inputs to the ECU from the WB unit with one of them being to the D14 pin?

Do u want to run closed loop & be able to datalog WB info at the same time?

theodd001 · Post by **theodd001** » Mon Feb 08, 2010 6:26 am

I'm using this:

http://www.aemelectronics.com/wideband- ... -gauge-25/

It has the 0-5V output and I was going to wire it to the B6 pin on my P72.

So its probably best just to leave the stock O2 sensor for when in closed loop and use the WB sensor just for tuning? I have two bung ports on my exhaust.

theodd001 · Post by **theodd001** » Mon Feb 08, 2010 6:28 am

I'm using this:

http://www.aemelectronics.com/wideband- ... -gauge-25/

It has the 0-5V output and I was going to wire it to the B6 pin on my P72.

So its probably best just to leave the stock O2 sensor for when in closed loop and use the WB sensor just for tuning? I have two bung ports on my exhaust.

fly_n · Post by **fly_n** » Mon Feb 08, 2010 9:05 am

With 2 bungs available & a single output WB unit such as the AEM,than yes that is probably your best solution.

The AEM will simulate NB signals,but it is a manual affair to make it happen & u would have to deal with swapping inputs or setting up a switched input or similar.
I have a suspicion that the AEM gauge also reverts to N readings once u switch the signal anyway,so yeah....just stick with the double bunger set-up.....

Im not sure whether your P72 has B6 circuitry or not,i know that my jdmP72 dont,but i guess u will find out....

theodd001 · Post by **theodd001** » Mon Feb 08, 2010 12:23 pm

Yeah I inspected my USDM P72 and it doesn't look like it has R2 and R3 but Im not sure if it has 1N4148 diodes... i know its setup for boost control, I have a boost control solenoid that it came with... Does anyone know for sure if the P72 will allow for the B6 input?

Post by **Spunkster** » Mon Feb 08, 2010 1:36 pm

If it does not have the resistors, then it should work.

theodd001 · Post by **theodd001** » Mon Feb 08, 2010 6:12 pm

Thanx, can't wait!

Hondata

O2 Sensor/Lambda Wide band

O2 Sensor/Lambda Wide band

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