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Old 02-20-2012, 02:09 AM   #1
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Default Another aem wideband reading off from tunerstudio

Hi guys i have an aem wideband and for some reason it is reading a about .5 to 1 off from my tunerstudio gauge. I've read pretty much every thread on the matter and tried multiple grounds from where the ecu is grounded and a few other places in between. Calibrated it to 1.09v to 12.18afr and 4.05v to 18.10afr as in the gauges instructions. Running out of ideas :/
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Old 02-20-2012, 06:02 AM   #2
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Try using slightly different values... Change by a decimal and see if your reading gets further away or comes in closer and keep tweaking to try to get it as close as you can. I tweaked the recommended values to get TunerStudio to match my MTX-L gauge. I think I managed to get it within +/- 0.1 when it was off by 0.8 or so with the recommended values. My gauge/controller is grounded at the ECU.
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Old 02-20-2012, 09:58 AM   #3
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My own experience with one AEM UEGO gauge was similar to yours. It seems that the calibration of the analog output simply ain't quite right, such that it doesn't match the published specs relative to what the gauge is displaying.

Easiest thing to do is just alter your calibration within the software to match.
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Old 02-20-2012, 11:05 AM   #4
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Ah thats pretty simple. Guess that didn't come to mind at all. Will do! Thanks!
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Old 02-20-2012, 03:37 PM   #5
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Figured it out

Last edited by cowboys647; 02-20-2012 at 06:22 PM.
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Old 02-20-2012, 09:23 PM   #6
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Do you have a new-ish AEM, or is it an older one? I thought that AEM got this straightened out in the past year or so.
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Old 02-23-2012, 05:57 PM   #7
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Its an older one.
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Old 03-03-2012, 07:14 PM   #8
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Quote:
Originally Posted by cowboys647 View Post
Figured it out
What did you end up doing? I have the same issue here.
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Old 03-03-2012, 07:40 PM   #9
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If you've already checked to make sure your grounds are good, just keep calibrating with different numbers until it starts reading right. Example: 1.09volts-12.18afr and 4.06volts-18.1afr and if tunerstudio is reading lets say 1 point richer then you just change it to 1.09v-13.18 etc.. until your as close as you can get
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Old 03-03-2012, 08:27 PM   #10
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Quote:
Originally Posted by Ben View Post
Do you have a new-ish AEM, or is it an older one? I thought that AEM got this straightened out in the past year or so.
Yeah I have a newer one (~4 months old) and it is calibrated perfectly in TS.
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Old 07-24-2012, 01:23 AM   #11
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Having similar issue with my lc-1. Where are you changing values to make the gauge read correctly?
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Old 07-24-2012, 02:34 AM   #12
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Quote:
Originally Posted by Rushin View Post
Having similar issue with my lc-1. Where are you changing values to make the gauge read correctly?
Try wiring it again. They are usually very, very close if the grounds are done correctly.
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Old 07-26-2012, 02:28 PM   #13
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LC-1 instructions are not explicit about where the xd 16 gauge is grounded. All four grounds, two system, one gauge, and the ecu all need to terminate at the same point to avoid any potential voltage offsets. When this is accomplished you can manually change the offset. I think it is a natural mistake to ground your gauge to whatever is close and not to run the wire to the common ground, which leads to all of these threads recently.

In analog electronics it makes sense that it would be very difficult to get a perfect match between two systems.
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