If i switch from coffee, tea and pop to sugar free diluted juice which has plenty of water in will it help clear clogged pores on face?

Fruits, vegs, water: Yes, increasing water and decreasing sugar will help. Also cleaning with a mild but non-drying soap such as Neutrogena. Take vitamins A,E, D, and Zinc for your skin. Keep it clean but don't scrub hard. Use tissue paper to blot any excess oil. If you can get a prescription for Tretinoin, that will help your face skin to turn over and decrease pores. Or, look for a product with retinoids.