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Myblackhatch
Joined: 04 Oct 2011
Posts: 51
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 Posted: Tue Jan 24, 2012 8:16 am Post subject: Aem wideband with hondata |
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So I have my aem wideband that I have tapped into hondata s300 into d14 with the white wire from the wideband. My wideband is powered by the cigarette +12.
My problem is when I was tryin to adjust my afr, hondata is showing a completely different number than the gauge is showing. I'm running 16,s and it's showing 17 something.
I noticed that every time I hit a new load cell in hondata that it just adds to the current ratio. 17.6 becomes 17.7 than 17.8 even if I'm in the 13.1 and dropping according to the gauge.
Any ideas?
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Flr Power
Joined: 05 Jun 2007
Posts: 100
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| Posted: Tue Jan 24, 2012 9:07 am Post subject: |
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| Basicaly all wideband with an analog signal have to be calibrated to match the ground offset to the ECU. Adjust the table up or down (ECU or wideband) to match the number you see on the AEM wideband and make sure the electrical connections are solid. |
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eTiLiKo
Joined: 18 Mar 2011
Posts: 28
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| Posted: Wed Jan 25, 2012 7:54 am Post subject: |
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| Wire the wideband on a good ground, and sync the Smanager using the voltage offset cell. |
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Johnny_9
Joined: 17 May 2006
Posts: 211
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| Posted: Wed Jan 25, 2012 8:09 am Post subject: |
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| are you using a tail pipe? |
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Myblackhatch
Joined: 04 Oct 2011
Posts: 51
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| Posted: Wed Jan 25, 2012 9:32 am Post subject: |
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| Johnny_9 wrote: | | are you using a tail pipe? |
Yes with the innovate exhaust mount.
Is the ground going into the cig adapter not good enough?
Also when I use the white 0 - 5v wire I seem to just get a constant voltage. The blue wire is the one that gives me different readings but are not accurate.
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eTiLiKo
Joined: 18 Mar 2011
Posts: 28
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| Posted: Wed Jan 25, 2012 3:40 pm Post subject: |
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White wire is the right one.
Sometimes +12v and GND from the cig isn't good enough, or to be more precise, not the same precise voltage of the ecu. |
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Myblackhatch
Joined: 04 Oct 2011
Posts: 51
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| Posted: Wed Jan 25, 2012 5:12 pm Post subject: |
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| eTiLiKo wrote: | White wire is the right one.
Sometimes +12v and GND from the cig isn't good enough, or to be more precise, not the same precise voltage of the ecu. |
Ok. So what im going to do is check the output volts of the white wire when the sensor is disconnected see if im getting the right output at all and i'll post back with what I find tomorrow
I hope the cig ends up not being the issue. I hate connecting wires if I dont have to. Im trying to make this setup as portable as possible.
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xenocron
Joined: 06 Dec 2003
Posts: 162
Location: Jersey
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| Posted: Wed Jan 25, 2012 6:18 pm Post subject: |
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we make a patch harness with break outs so you can power/ground your wideband directly with the ECU. Its still not a perfect way, but makes your tuning setup portable in an OBD1 Honda at least
http://www.xenocron.com/obd1-tuner-harness-p-169.html
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Myblackhatch
Joined: 04 Oct 2011
Posts: 51
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| Posted: Wed Jan 25, 2012 9:12 pm Post subject: |
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2.474 volts at 14.8 coming from the white wire when pluged into my cig. If im not mistaken it should be 2.37.
just woundering why its off. I guess i will try to hardwire it into a different power supply.
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eTiLiKo
Joined: 18 Mar 2011
Posts: 28
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| Posted: Thu Jan 26, 2012 4:46 pm Post subject: |
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AEM instructions say 2.32v but it's wrong (confirmed from an AEM engineer). Appprox 2.5v is what you should have.
The problem is that the ecu see a different +12v and a different GND than the wideband, so you have a voltage offset.
You can try to adjust this gap by the voltage offset cell in the S300 parameters. If you are lucky enough the gap is linear. |
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Matt Cramer
Joined: 25 Sep 2007
Posts: 274
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| Posted: Fri Jan 27, 2012 6:21 am Post subject: |
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| Myblackhatch wrote: | 2.474 volts at 14.8 coming from the white wire when pluged into my cig. If im not mistaken it should be 2.37.
just woundering why its off. I guess i will try to hardwire it into a different power supply. |
This is a very common problem - AEM UEGO's analog outputs often don't match AEM's published specs.
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Johnny_9
Joined: 17 May 2006
Posts: 211
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| Posted: Wed Feb 15, 2012 6:54 am Post subject: |
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| Myblackhatch wrote: | | Johnny_9 wrote: | | are you using a tail pipe? |
Yes with the innovate exhaust mount.
Is the ground going into the cig adapter not good enough?
Also when I use the white 0 - 5v wire I seem to just get a constant voltage. The blue wire is the one that gives me different readings but are not accurate.
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at what rpm(s) is your AFR out? Idle? 3000rpm?
tail pipes may show lean, due to reversion |
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