AEM 02 feedback

[wraith]

I have a few questions about this. I just attached an LC1 to the rear O2 sensor harness plug using a spare coil pack side harness and it seems to be working like its supposed to. When I go into O2 feedback wizard, it cant find the template, but it seems to be working and the reading in lamda is very close to what it was set to without feedback about 1 lamda. In the AEM software, the back sensor is called O2#1 . My front O2 is #2, but its still a narrowband signal which reads very close in idle but I assume as we get further from 14.7:1 it will be off. My question is this. Does the AEM use #1 or #2 for feedback as default and where can you change this if its not? Usually, how far do you have feedback work and how well does it work into WOT? I was thinking to set the fuel fields as close to 11:1 A/F for pump gas and have the feedback at 11.5:1, since feedback is not instantaneous, it will reduce fuel towards a more powerful A/F while still starting out on the safe side, so knock control can kick in if its leaning out too much. I went for a ride and the car is much smoother with feedback on and it accelerates hard. I just want to make sure having the front NB O2 attached is not doing anything bad. I will eventually get one for the front but the plan is to replace the sensors in the stock position and keep a third in the DP for me to view on my LM1 inside the car when I want to...maybe take the box apart and attach it to my single din hole.

Sam

[3r tech]

Originally Posted by wraith

I have a few questions about this. I just attached an LC1 to the rear O2 sensor harness plug using a spare coil pack side harness and it seems to be working like its supposed to.

I assume when you say this you mean that you wired the LC1's outputs to the rear 02 sensor? not just the sensor itself?

Originally Posted by wraith

When I go into O2 feedback wizard, it cant find the template, but it seems to be working and the reading in lamda is very close to what it was set to without feedback about 1 lamda. In the AEM software, the back sensor is called O2#1 .

You can change which sensor is read as #1 in a variety of ways, the easiest of which is by simply swapping the pins at the ECU

Originally Posted by wraith

My front O2 is #2, but its still a narrowband signal which reads very close in idle but I assume as we get further from 14.7:1 it will be off.

AEM will care less about the narrowband signal and the best thing you can do is to remove the sensor altogether or at least unplug it (unless of course you need it for state inspection, then put it in and make it look plugged in when you need to

[quote=wraith;5613412]My question is this. Does the AEM use #1 or #2 for feedback as default and where can you change this if its not?
Ordinarily I would tell you to RTFM, but wth- by default the AEM uses O2#1, not sure if you can change it because I have never (in literally ten years) have ever tried.

Originally Posted by wraith

Usually, how far do you have feedback work and how well does it work into WOT? I was thinking to set the fuel fields as close to 11:1 A/F for pump gas and have the feedback at 11.5:1, since feedback is not instantaneous, it will reduce fuel towards a more powerful A/F while still starting out on the safe side, so knock control can kick in if its leaning out too much.

O2 feedback setup is largely a personal thing, I can maybe send you a couple of examples of setups that work extremely well. The MOST IMPORTANT thing to remember about 02 feedback is to tune your car as close as you can for the desired AFRs across the board THEN use o2 feedback to fine-tune it rather than trying to use the O2 feedback as a band-aid for poor or mediocre tuning.

Originally Posted by wraith

I went for a ride and the car is much smoother with feedback on and it accelerates hard. I just want to make sure having the front NB O2 attached is not doing anything bad. I will eventually get one for the front but the plan is to replace the sensors in the stock position and keep a third in the DP for me to view on my LM1 inside the car when I want to...maybe take the box apart and attach it to my single din hole.

Sam

Feel free to give me a call or PM and I will be happy to help you if I can.

[wraith]

I meant that I hooked the LC1 up to the car side harness so its wired into the AEM like a stock rear O2 sensor. The WB sensor itself plugs into the LC1 and in my case, its in my DP, so the stock NB sensors are still in the manifolds. It works, that wasn't my question, just wanted the person reading it to know the way I wired it so they would know why I needed to know if that rear one was considered default (its called #1 in the software).

I wanted to make sure it was not looking at the front #2 sensor for anything other then monitoring since mine is still connected and I would rather keep it connected to keep it from going bad. I cant get them out of the manifold after trying for hours so they will stay where they are.


Thanks for answering. I guess I wanted to know how other people are setting up the feedback on a 3S car. As far as the CD that comes with the AEM, its not very specific about alot of stuff. I never got a paper manual with the device if it was supposed to come with one since it was installed by a shop, but they never activated alot of the functions of the AEM which I am doing myself as I learn to use the device better. Up to this point, I was tuning in real time with a WB and a touchscreen tablet while driving and the cars tuned in but not fine tuned. Now, with the WB in place, I can actually run logs that mean something, so I plan on running the car and tweaking based on log data.