Too lean on the HSN and too rich on the LSN. These are finicky little engines, very small adjustments on the LSN. I don't know what fuel you are using but Traxxas fuel is poo. It will run better on a good quality 30% fuel like Byron's Race blend. You want a fuel with no more than 12% oil. Oil causes excess heat and makes a false tune condition more likely.
I had great luck with Trinity MHP 30% fuel in my TRX mills.
You need to start with a fresh glow plug too, you more than likely have distorted your current plug from running the engine lean and too hard too soon. It will not run right with a distorted plug. It will be impossible to tune.