In a medium saucepan, bring the maple syrup to a boil. Reduce the heat and allow it to simmer for around 5 minutes, or until the maple syrup has reduced to around 3/4 cup.
Mix in the creams and salt. Bring the mixture to a boil then remove from the heat.
In a small bowl, beat together the eggs. Slowly mix in around 1 cup of the hot mixture. Add this mixture to the saucepan with the hot cream and whisk together.
Cook over medium heat, whisking constantly until the mixture is hot. Do not let the mixture boil.
Pour the mixture into a glass bowl. Cover and refrigerate for around 3-4 hours, or until cold.
Freeze according to manufacturer's instructions, adding in the pecans when the mixture is 30 minutes from being done.
Pour into an airtight container and place in the freezer overnight.