I just completed the install of my AEM EUGO. I used the bung that comes on my downpipe (pretty much right behind the turbo). When I first started the car up, it read as idling at about 10:1 AFR. That seems dangerously rich for idle. I was pretty much afraid to keep the car running at that AFR. I have a COBB off the shelf map with a VF39, and TBE. Only thing I can think of is that the map I have is for 91Octane, but I am currently running 93octane fuel, but even still, I can't imagine that causing the car to run that rich. Any ideas? Maybe the sensor is bad?