o2 feedback working away from target | AEM
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mdlimy
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Joined: 08/06/2015 - 11:00
o2 feedback working away from target

I am having an issue with the closed loop o2 feedback on my series 1 ems. I have left the PI settings alone for now, and have set my target A/F table. My o2 sensor is calibrated and i have adjsted the gain so that the software is seeing the same as my guage. I dont believe the PI settings are the issue, since i dont seem to be overshooting the target, it just seems to be going the complete opposite direction. Here is the problem.

With feedback off i am idling at 14.2 afr, I have purposly set my fuel map like this to help diagnose this issue.

With feedback on i have a target of 14.7, and my max rich and lean set at 20%.

It should be removing fuel to get to 14.7, instead it gets richer.

BUT, if i increase the max rich % it just gets richer and richer. The more i allow the ecu to adjust, the more it DOES adjust, in the complete wrong direction.

 

Here is what my parameters would like like, roughly when i have the feedback turn on

o2 Target - 14.7

o2 #1 - 13.1

o2 #1 fb value 20%

 

With my max rich/lean % set at 0% i obviously stay exactly 14.2 which is what my fuel map designates. Every little bit i increase the max limits, it gets richer and richer.

 

Has anyone experieced this?

I can post a cal file and log this evening when i get home.

mdlimy
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Last seen: 4 years 10 months ago
Joined: 08/06/2015 - 11:00
Heres a video of the issue.

Heres a video of the issue.

http://youtu.be/jLFg9ErEquk

mdlimy
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Last seen: 4 years 10 months ago
Joined: 08/06/2015 - 11:00
Figured it out, I feel like

Figured it out, I feel like an idiot!

The max lean limit needed to be a negative number, ie -15%. Works like a charm!