If there is gas exiting the exhaust it is running to rich. Tuning is something that is hard at first. Set all your trims to neutral and start by opening the idle needle 1/8 of a turn at a time until you find the happy point where it will idle for a minute without any trim or throttle from you.
Once you get there then you can work with the HSN and LSN. But you got to get the idle set right first.