All you fitech tuning guru's

Where did you install the O2? I put mine 18" down on the DP. I also had lots of tuning issues when I had leaks in my hotside. As I fixed the leaks the Fitech improved. I believe your fuel pressure gauge will drop to 0 after car has been off for a while. Are you experiencing any bogging when coming off idle? Most of my rich issues were at off idle and transitioning to cruise level RPMs.