92.3% would indicate that your car is already running very lean.
Of course a slight turn anti-clockwise and she wouldn't start.
Try going the other way.
From my own experience and Steve's words of wisdom when I had problems with my car, the car should run well between a wide range of the mixture adjustment.
At this point in time, seems to me that you are at the very end of the lean side of the mixture adjustment, which is why the car will not start, and if it does, will probably barely hold idle.
Let us know how it goes.