Welp, I think the BL will tell alot at all levels, although it's suppose to reset to 128 at WOT, I think. It seems your computer thinks it's lean, and/or it's getting air the computer doesn't know about. Maybe the egr isn't working right, leaky vac line or something,, might plug the line to the valve and see if there's a difference. Also, unmetered air leaks would do that.
Also, did you get the chips before the upgrades you have listed?
Might try turning the fuel pressure up a tad or 2 and see if there's a long term change.