Aem Uego only reads lean

[Raymos24]

Hey guys I have a question about my AEM uego. It has been acting funny. Once my car is warm the gauge reads extremely lean (around 16.4-17.1) and even if I step on it, it won't go past 16.0. Now, I have searched on here and I used one of the methods to check if the sensor was crap. I turn the switch over and the gauge goes through the initial sequence then slowly ticks down to "as lean as possible (--)". I guess this means the sensor is ok since it can sense that free air is just passing by? Any suggestions are appreciated . Is it possible I am running this lean? I have some 1000cc injectors on E85. Btw the sensor is mounted in the rear o2 spot but I do not have a cat.

 

[rstchris]

If you bought it new you might be running that lean. Do you use closed loop? What are the fuel trims? Maybe pull it off and try it on a friends stock car to make sure it's ok.

 

[Raymos24]

Well I definitely think I am that lean at idle becuase at 1k it feels like it wants to turn off. However anything above idle feels pretty good but he most that I see is a ratio of like 16.1. Maybe I am that lean?

 

[95blackGsTurbo]

What are you using to tune the system? Have you actually had it setup for 1000cc and E85? Also putting it in the rear o2 bung is too far down the system. Mount it about 18 inches from the turbo outlet to get an accurate reading.

 

[98DropTop]

My Uego was always reading rich, very rich, like around 10.7 give or take, the odd time it would go up to 12ish while driving..... I finally changed my front 02 sensor and my readings went back to normal.... 14.7 ...... I know your running lean, but just a thought.