Drain juice from clams and pour over potatoes. Add enough water to cover. Cook for about 10 minutes then add sugar, vinegar and salt. Cook until potatoes are tender.
Melt butter, saute celery and onions; then add flour and blend. Add half/half and milk stirring constantly. Add potatoes (do not drain) and mix thoroughly. Add clams and cook for another 5 minutes or so (since the clams are generally already cooked you are basically heating them up). Garnish with crisp bacon