When I adjusted mine, the colortune wanted a certain setting to get the flame blue, but listening by ear, it didn't sound as good, when I adjusted by sound the colortune was starting to go more orange, but it ran better.
So I'm guessing he wasn't far out to begin with, but it made some difference to how the car felt. My problem was being over rich and sooting up the plugs and exhaust. I don't get any noticeable bogging. Maybe have a play with it, mark where you start from and try adjusting things, assuming you've done the other checks first I suggested, plus I forgot to mention I checked