1. Mix together in a large Pyrex measuring cup, apple juice, sugar, soy sauce, vinegar, ginger, garlic powder and pepper.
2. Pour small amount in bottom of crock pot.
3. Place roast in crock pot with fat side up.
4. Pour remaining sauce over roast.
5. Cook on High for 4 hours or Low 8 hours or until meat is no longer pink.
6. Remove pork and slice.
7. Place on a platter and cover with aluminum foil.
8. Place in a 200 degree oven to keep warm while thickening juices.
9. Strain juice and place in a small saucepan.
10. Bring mixture to boil.
11. Mix together water and cornstarch until smooth.
12. Stir into boiling mixture.
13. Cook for 1 to 2 minutes until mixture thickens.
14. Serve over sliced pork roast.