Voltage Offset for AEM UEGO (eld input/choose PLX wideband)

allanonjj · Post by **allanonjj** » Sat Apr 07, 2007 2:49 pm

00 GSR
p-28
Im using an AEM UEGO wideband, running it in through the ANALOG 2 INPUT. The problem I am having is the resolution. There were only 12 spots (options tab/settings/analog input 2) in the conversion table for A/F Voltages=Values, the AEM has 32 conversians. When I datalog,.. all I get for A/F values are whole #'s (ex:12, 13, 15 not 12.8, 13.5, 15.1).

1.Is it necessary to "plug in" 12 conversians or do I just do the lowest a/f voltage and then the highest a/f voltage?

2.Since I am using an AEM and thats not one of the pre-selected widebands (in the dropdown box under the Wideband Lambda)do I need to select "custom" or one of the other wideband selections?

jordancivic · Post by **jordancivic** » Sun Apr 08, 2007 1:37 pm

Selecting the PLX should work the same, check the guage readings match hondata readings.

Why not use the eld input option?

allanonjj · Post by **allanonjj** » Sun Apr 08, 2007 6:42 pm

The gauge will read (for example) 13.7, while the Hondata datalog will read just 13. If the gauge goes to 14 though, so does Hondata. Like I said before, The AF on the datalog isnt wrong, it just isnt giving me a decimal point reading.

I dont see any reason why I cant use the ELD. Is that the input I am supposed to be using?

When we connected the analog input we had to remove resistor r2 and r3 from the board,.. I assumed that by doing that it would make the readings we got accurate.

jordancivic · Post by **jordancivic** » Sun Apr 08, 2007 11:41 pm

Just use the ELD input and PLX drop down, see if this works.

Much simpler, cant see why you would configure aux2 when you have this setup for eld.

Check the help for ' wideband '

allanonjj · Post by **allanonjj** » Mon Apr 09, 2007 10:04 am

O.K.,

What do I put in for the voltage offset?

jordancivic · Post by **jordancivic** » Mon Apr 09, 2007 10:16 am

I believe the PLX is close, select this and see if Hondata matches whats displayed on the AEM, use the offset if its close.

allanonjj · Post by **allanonjj** » Mon Apr 09, 2007 11:24 am

o.k.,

Are you saying that I should just "play" with the voltage offset till I get it to match?

allanonjj · Post by **allanonjj** » Tue Apr 10, 2007 6:17 am

Got it!!!

Connected to the eld input and "played" with the voltage offset till I got it right on. Heres the new calibration:

jordancivic · Post by **jordancivic** » Tue Apr 10, 2007 11:00 am

Great, out of interest how far out was the PLX settings?

Thinking of getting an aem myself, nicer looking than the plx

allanonjj · Post by **allanonjj** » Tue Apr 10, 2007 12:36 pm

The voltage offset was -.04 . As soon as I changed that, the AEM and the Datalog matched.