Good stuff Mark i have just seen this post now.

I may make a harness to make use of the autolearn feature on the greddy EMU (its been tuned previously on a dyno manually by me), can anyone tell me which wire specifically is the 0-5v source on the AEM UEGO?, i believe its the white wire on the AEM?

Can i take the voltage from a wire going to the AEM afr gauge or does it need to come from the W/B sensor itself? or the connector on the W/B sensor itself?

Also what do i put in the range from the AEM UEGO?, is it 10.0 to 20.0?

Thanks

 

Bump, lots of people use an AEM UEGO.

All i want to do is log the AFR, but unsure where/which wires i tap into.

Thanks

 

See page 4 of this document. It's probably not a bad idea to read the entire manual

http://forum.aempower.com/forum/index.php?...9.0;attach=4370

 

Thanks i read that this morning, but upon further investigation some people say use the white wire other use the brown wire from the sensor.

 

There's actually a harness for the A/F from Greddy, part # 15900912.

It plugs into an option port and you just wire the white wires together and ground the gray wire.

 

Sure i have seen that, i have made one but just a harness alone is no help to me as its just a connector and 2 lose wires, thus i still wonder where it goes too.

 

more than just ground the gray..

It is best to ground the gray wire to the exact same spot as the ground location of your wideband controller.


You should ground all controllers, EMUs/ECUs to the same exact point to reduce any possible voltage noise or transient voltage spikes for all components.

Now some may argue just put to the body its all a ground. Well may be in a very loose terms yes. However you want all critical electrical components that interface with each other to have exactly the same electrical potential. Thus put everything to the same ground point.

 

^^

What Mark said.

 

This!