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Logging Wideband AFR via Rear O2 ECU ADC Input

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Old Aug 24, 2009, 09:01 PM
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Ok, so I'm actually doing this right now.

I ran out of daylight, so I'll finish the actual wiring tomorrow.

I have a HowTo coming with pictures as well, if anybody is interested.
Old Aug 24, 2009, 11:27 PM
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Thumbs up

Originally Posted by xPRimNT
Ok, so I'm actually doing this right now.

I ran out of daylight, so I'll finish the actual wiring tomorrow.

I have a HowTo coming with pictures as well, if anybody is interested.
Excellent, report back when you've got it together.

I had to put this on hold until I tracked down a boost leak. Just figured it out tonight: leaking Diverter Valve. Solution: took the thing out, flipped it then reversed it (just like that Missy Elliott song...lol.)
Old Aug 25, 2009, 06:18 AM
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Originally Posted by xPRimNT
Ok, so I'm actually doing this right now.

I ran out of daylight, so I'll finish the actual wiring tomorrow.

I have a HowTo coming with pictures as well, if anybody is interested.
\

If I understand this correctly, you are disabling the rear 02 sensor to convert it's input (yellow wire) into the ecu for evoscan...

Are you welding a new bung for the WB onto the DP and plugging the rear 02 bung?
Old Aug 25, 2009, 07:46 AM
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Originally Posted by stokEd
Excellent, report back when you've got it together.

I had to put this on hold until I tracked down a boost leak. Just figured it out tonight: leaking Diverter Valve. Solution: took the thing out, flipped it then reversed it (just like that Missy Elliott song...lol.)
How did you figure out that you had a leak? Stock BPV?


Originally Posted by coevolve
\

If I understand this correctly, you are disabling the rear 02 sensor to convert it's input (yellow wire) into the ecu for evoscan...

Are you welding a new bung for the WB onto the DP and plugging the rear 02 bung?
That's the gist of it!

I have a test pipe, so instead off putting the rear O2 sensor in the bung, I put the WB sensor. I'll have many more details soon.
Old Aug 25, 2009, 07:50 AM
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Doing this on my CT9A I still have the rear O2 connected though as it still needs to see the heater circuit or it will chuck a CEL.

My NGK works awesome this way have been logging for over a year like that
Old Aug 25, 2009, 08:32 AM
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Originally Posted by gsrboi80
Doing this on my CT9A I still have the rear O2 connected though as it still needs to see the heater circuit or it will chuck a CEL.

My NGK works awesome this way have been logging for over a year like that
Do you have P-bit disabled in EcuFlash?
Old Aug 25, 2009, 08:47 AM
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Yup rear O2 disabled in P-BIT, WB pinned directly to ECU and EVOSCAN xml modded with widebands operating range formula
Old Aug 25, 2009, 10:12 AM
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Originally Posted by gsrboi80
Yup rear O2 disabled in P-BIT, WB pinned directly to ECU and EVOSCAN xml modded with widebands operating range formula
Great, thank you.
Old Aug 25, 2009, 09:25 PM
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Installed

I'll test logging and get the HowTo up tomorrow.

(Man that harness is hard to get to)
Old Aug 26, 2009, 09:43 AM
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Tephra, will logging the ADC at that address slow down the other Mode23 items? Or is there a Mode23 address for ADC (if it isn't already)?
Old Aug 26, 2009, 04:01 PM
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yeh the more things you log the slower they all go.

what u logging now?
Old Aug 26, 2009, 04:43 PM
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Damn, I may need to get in touch with you about the address.

And I know the more things you log the slower it goes, I was just wondering if the address you mentioned was "Mode23".

The address isn't yet working for me. I'll try a few more things and then cry for help. Would you mind double checking the address for 52680020?
Old Aug 26, 2009, 05:39 PM
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Originally Posted by tephra
0x80834E - it's 2byte
Its a memory address, if you want the requestid for evoscan, it will be something like 0x2380834E, make sure you set ResponseBytes="2"
Old Aug 26, 2009, 07:55 PM
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^ Figured it out. The address was wrong. I'll have all the details up in a bit.
Old Aug 26, 2009, 07:56 PM
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what my address was wrong?


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