I hate to break this to you guys, but you can't tell if the car is running lean unless there's actually values listed on the AFR graph. Some tuners put a "red line" around stoich 14.7:1, others put it around 13:1, others put it around 12:1. If you can tell me what the "red line" in the AFR column signifies as far as AFR goes, I can tell you if you're running lean. Me personally, on an inline 4 cylinder w/forged internals I prefer to tune around 12:1 tapering down to around 11.5:1 in the upper RPMs. On something like a 2.0L Subaru WRX, a boxer motor w/cast internals, I would recommend tuning between 11.2-11.5:1 as the extra fuel is needed to cool the heads because boxer motors have an inherent trait of retaining more heat than inlines.
Unless you actually have values for your AFR's, there's no way you can tell just how rich/lean the car is running, unless everyone else just knows what that "red line" signifies on this particular dyno. To be clear I'm talking about the completely straight line that starts at the beginning of the graph, not your "after" AFR graph line.
If you have the run file(s), you can email it to me, I'll put it on WinPEP 7, and repost it with your exact AFR's, so you can see if it's actually running lean, and not just speculate. If you don't have the run files, call your tuner, and have them send them to you in an email if they can.
