I'm not quite sure what those numbers are but if i'm interpreting correctly, you're very rich. The range of my AEM Uego is 10.0-18.0, 10.0 being rich and 18.0 being lean. You want to idle/cruise around 14.5 and be around 11.5 wide open throttle. If you had a vacuum leak you'd almost positively be running lean, so a vac leak is probably not your problem. Take some fuel out of the tune and see what happens. If no way to adjust your fuel value then turn down your FPR to see if that has any effect. I wouldn't suggest DD operating below 3bar (only cause I'm not certain of potential negative affects. If AFRs are good below 3bar I can't imagine a negative consequence...but I don't want to give mis-info). If turning down the FPR leans out your AFRs then you know you need to adjust the tune, turn it back to 3bar and continue to practice patience.
This all, again, based upon me interpreting the numbers you wrote correctly.
Let us know :-)