Also, one extra thing. I purchased the serial to USB cable and I noticed after I did these above steps that there is an option in the drop down menu at the top for AEM UEGO. Does this need to be selected to log?

Is there any way to log the AEM without wiring the gauge direct to the ECU?

 

Yes, you use the serial output

 

Will this work without doing step 7? The reason I ask is because I'm not using the Tephra mods and disabling the rear O2 sensor isn't an option on my ROM.

 

Can you elaborate a bit? Im not familiar with the programs really and this is the first time Ive gotten into logging and stuff like that so its all new to me. Im sure its simple, its just not clicking really yet lol.

 

On the blue serial output wire, I believe it's blue anyways. You've gotta make a plug for it to plug straight into the laptop via Serial cable or serial-to-usb cable...There is a how to on the forums to make this plug

 

So the wideband wires directly into the laptop youre saying?? Ill try to find the how to.

 

You have to build your own wire. There is a how to on here, just search for UEGO serial or something like that!

 

Ok thanks man

 

For this writeup, which I will likely be trying this out instead, is it also PIN 75 on an Evo 9 ECU?

 

Find a wire diagram somewhere for the ECU, I know there's one somewhere. And relate 75 on an evo 8 ecu compared to a 9.

 

Can anyone tell me if the wiring is the same for the 02 OZ manual or can you link me to were I could findout?
~Micah

 

this worked great for me but i had to use +9.8 that seem to get mine dead on

 

this will help a little more on wire identification
http://www.lancerregister.com/showthread.php?t=142077

 

Nice! I'll check that out on mine!

 

yeah whats the deal with the formula

AEM state that the analog output equals

0v = 10AFR
2.5v = 15AFR
5v = 20AFR

so that should mean for a 1023ADC:
AFR = 10 + (x*10/1023)

for a 255ADC:
AFR=10 + (x*10/255)

However my guy is saying his gauge is reading significantly richer than the ECU/evoscan log

Maybe its ground offsets... hrmm