how-to: Log AFR from the LC-1 w/o a serial cable
Does anyone know if this can be done with the AEM wideband? Run the blue wire into the ecu and the black wire to ground (those are the 2 wires that go into the serial connector)?
Just curious if there is a solution rather than logging the aem through a diy serial connector?
Basically I am working on tuning a car with a aem wideband and we cant get the serial cable to work - its wired correctly, and the computer is recognizing the usb to serial adapter (dynex) but evoscan just comes up with an error every time......
I am going to try flashing the V5 94170014 patch (he has 94170008 currently and the 14 is supposed to work) on his ecu for the rear O2 sim and thought maybe we can ditch the serial and log the aem through the ecu instead?
Any help would be appreciated!!
Just curious if there is a solution rather than logging the aem through a diy serial connector?
Basically I am working on tuning a car with a aem wideband and we cant get the serial cable to work - its wired correctly, and the computer is recognizing the usb to serial adapter (dynex) but evoscan just comes up with an error every time......
I am going to try flashing the V5 94170014 patch (he has 94170008 currently and the 14 is supposed to work) on his ecu for the rear O2 sim and thought maybe we can ditch the serial and log the aem through the ecu instead?
Any help would be appreciated!!
There are actually 2 signal output wires, one for the serial cable (blue I think) and another maybe white? that outputs the 0-5v. I used the 0-5v when I was using a greddy-e-manage.
the white wire is listed at the 5v output according to the manual.
if someone has AEM's correlation between voltage and AFR, please share.
i'll try to call them up on of these days when im not busy at work...
if someone has AEM's correlation between voltage and AFR, please share.
i'll try to call them up on of these days when im not busy at work...
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Joined: May 2009
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From: mnt vernon ny
Evolved Member
Joined: May 2009
Posts: 522
Likes: 2
From: mnt vernon ny
hey i dont understand math much but i did a few google searches and came up with this. the equations look like the ones you write let me know if it helped a bit.
http://www.rx7club.com/showthread.php?t=272828
for the uego
http://www.rx7club.com/showthread.php?t=272828
for the uego
Evolved Member
Joined: May 2009
Posts: 522
Likes: 2
From: mnt vernon ny
also found this im hoping it doesnt only aplies to the aem ems but maybe some one can test it im waiting on my uego in the mail
page 5
http://www.aempower.com/images/produ...%2030-4100.pdf
page 5
http://www.aempower.com/images/produ...%2030-4100.pdf
also found this im hoping it doesnt only aplies to the aem ems but maybe some one can test it im waiting on my uego in the mail
page 5
http://www.aempower.com/images/produ...%2030-4100.pdf
page 5
http://www.aempower.com/images/produ...%2030-4100.pdf
I think its (Voltage)(2) + 10 = A/F for gasoline
Last edited by steadly2004; Jan 8, 2010 at 02:08 PM.
Evolved Member
Joined: May 2009
Posts: 522
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From: mnt vernon ny
seems like your right... i cant post the site for some off reason....
Last edited by hediki12; Jan 8, 2010 at 02:55 PM.
using this formula 0.03913*x+10 for the AEM UEGO
the AFRs read very close to the actual gauge. its a difference of +0.1 to +0.2 but it might just be a time issue
Not sure which of the two is more accurate but they are very close and reads fast.
here is a side by side comparison
the AFRs read very close to the actual gauge. its a difference of +0.1 to +0.2 but it might just be a time issue
Not sure which of the two is more accurate but they are very close and reads fast.
here is a side by side comparison
I log via serial to usb a LM-2 in Evoscan.
Evoscan formula is (x) as you know.
Do you use this formula for AEM uego in order to get the proper value?
What I suspect is that my Evoscan will have a delay when I read it via serial to usb.
Do I need to use maybe a formula also??
Thanks
Evoscan formula is (x) as you know.
Do you use this formula for AEM uego in order to get the proper value?
What I suspect is that my Evoscan will have a delay when I read it via serial to usb.
Do I need to use maybe a formula also??
Thanks
mrfred, or anyone who can help, how should i adjust my formula to make it read more closely to the gauge itself. my AFR's are about +0.1 to +0.2 compared the gauge.
my values im using are 19.98-10.0, so the current formula is 0.03913*x+10 for the AEM UEGO
Danieln, the "x" is strictly for logging with serial cable under the "external wideband" option.
the placement for the formula you input is for the "wideband AFR" option shown here:
my values im using are 19.98-10.0, so the current formula is 0.03913*x+10 for the AEM UEGO
Danieln, the "x" is strictly for logging with serial cable under the "external wideband" option.
the placement for the formula you input is for the "wideband AFR" option shown here:
Last edited by Drill_Sergeant; Jan 10, 2010 at 03:30 PM.