Better Than Sex Cake

INGREDIENTS:

1 pk Butter chocolate cake mix;
-or deep chocolate (Duncan
-Hines)
3/4 c Pecans; toasted & chopped
2 pk Semisweet chocolate chips;
-12-oz; divided
1 pk Pudding mix; 4-oz chocolate
-flavor
1 c Sour cream
4 Eggs
1/4 c Coffee
2 ts Vanilla; divided
1 c Water
1/2 c Oil