Cut the pork shoulder into 2 inch cubes and place in the pot of an electric pressure cooker.
Sprinkle with the brown sugar, cumin, onion powder, garlic powder, and 1 teaspoon of salt. Stir to coat the meat.
Pour in the orange juice.
Place the lid on the pressure cook and set vent to sealing.
Cook on high pressure for 27 minutes. Let pressure release naturally, about 15 minutes.
Remove the pork from the liquid and shred with two forks.
Place meat on a metal cookie sheet and squeeze lime juice over the top of the meat. Sprinkle with the remaining salt. Taste and add additional salt, if needed.
Place under the broiler until meat is crisp on the edges, about 5 minutes, stirring occasionally.
Sprinkle meat with cilantro and serve as a filling for tacos, in a burrito, or over rice.