today the belt on my v6 f150 snapped. I got the new belt on and everything on,no problem but it will not get tight for me. the tensionor pulley is spring loaded and i can't really do much manually with it except turn it then it goes right back in place. any help is much appreciated, i have about an hour before i have to be at work.

 

Is the tensioner tight? Or did the tensioner break?

Are you sure you are following the correct belt routing?

 

the belts through right the tensionor is still moving and everything but its not putting any tension on the belt.
i took the belt off of my other same exact f150. it didint work, and when i tried to put it back on the truck it came off of im having the same problem.

 

you need to check the routing of the belt.