AEM gauge and voltage offset

smracing · Post by **smracing** » Mon Sep 25, 2006 8:06 am

I am running an AEM gauge type wideband and feed it into the Hondata through the ELD pin. Unless I run a voltage offset of -1.5 I can't get the AEM gauge to read the same as the Hondata.

Usually Hondata reads two points leaner than the gauge.

This can't be right.

Post by **Hondata** » Mon Sep 25, 2006 8:51 am

What voltage/lambda conversion table are you using?

smracing · Post by **smracing** » Mon Sep 25, 2006 5:22 pm

P00 Setting on the Gauge, 0-5V.
Straight from the AEM manual

.5v-10.0
.75v-11
1.0-11.5
1.5-12
2.00-13
2.38-14
2.75-14.7
3.00-15.5
3.5-16
4.0-17
4.25-18

I am using a -1.0 offset right now and it is reading what the gauge is reading, but surely there is a better way to do it.

ITR 1102 · Post by **ITR 1102** » Mon Sep 25, 2006 6:46 pm

I would like to know more about this as well since I am about to install the wideband which has been sitting on my desk for weeks :roll:

Post by **Spunkster** » Tue Sep 26, 2006 9:43 am

You may have the Wideband set incorrectly since there are I believe 4 output settings.

smracing · Post by **smracing** » Tue Sep 26, 2006 4:31 pm

I am using the 0-5V settings. I have used the o-1V settings before but they don't offer the accuracy.

Post by **Spunkster** » Wed Sep 27, 2006 9:15 am

THere is more than one 0-5v setting if I remember correctly.

smracing · Post by **smracing** » Wed Sep 27, 2006 10:30 am

The two zero to five volts that you refer to are virtually the same. One displays AFR and the other displays Lambda values. The AFR position two is a 1-2 volt setting. The third position is a 0-1V calibration as is position four.

I am using the right setting for what I am trying to do. 0-5V gives the best accuracy range.

mrw · Post by **mrw** » Mon May 07, 2007 6:40 pm

Hy, Smracing did you ever figure your problem out? I have a similar problem with my AEM wide band O2. Need a big offset of about -1.0 to get the readings to match.

smracing · Post by **smracing** » Tue May 15, 2007 8:48 pm

Sorta not really. The last time checked it was off in the Smanager, but I haven't been tuning with it lately. I will have to look the next time I make a change.