Ok, i just installed the fjo. What do i do with the stock o2 sensor??unplug it??? Its still plugged in and i 'm running both sensors.

btw, i teed the fjo signal wire to the primary o2, lambda wire.

Also, how do i check the a/f on the aem? Man i'm totally lost.

 

I'd like to know as well. The AEM board isnt very clear on wiring of the FJO.

 

http://www.fjoinc.com/automotive/dow...%20Manual).pdf

have you read this yet?

 

You need to plug in the FJO AFR numbers into the Oxygen #1 raw volts table. Then you will want to compare afr reading between the ems and fjo display (you have the display right?). This can be found by going to Setup--Sensor setup-- O2 sensor. To align them you will need to goto O2 #1 options gain---should be something like .95 - .97. You want the two displays to read the same afr.

 

i thought i didnt need the display since i had the aem???

 

What do i do with the stock o2 sensor????just leave it in the exhaust and unplug it???

 

Well, you really dont need the display...but I would want it--are you really gonna drive around all the time with the laptop on the seat so you can look at your afr?
Anyways, yeah just plug up the stock sensor hole.

Here is that cal spec for loading the ems

 

you dont need the display if you have the fjo hooked up to the EMS. you can leave the o2 sensor plugged in and still use the fjo

 

Soooo.

Does the AEM use two different pins than the stock sensor? Or do you use the stock sensor wiring for the FJO connection?

 

I used the fjo connection. Left the stock sensor still plugged up. My only problem is my readings look all messed up. Something doesnt seem right. And the only place i know how to check the a/f is in the o2feedback, parameters. Man i'm totally lost

 

OK.

How does it connect to the EMS unit? Through seperate pins or the original O2 sensor pin locations?

 

With the black 4-pin square connector i did these to the wires:

white wire: 12v power source
Black: grounded it
red: teed it into the wire that goes into the ems(o2 primary, lambda)
green: teed it into the wire that goes into the ems(sensor ground)