How to fix serpentine belt rotor pulley scheme is offline how do i correct the problem?
belt pops off
It may be you tensioner or it can be that the belt is on wrong. If we knew the model vehicle you had we can locate the proper alignment if the belt. You may have to take it to a mechanic to see what the problem may be.
Your tensioner is bad or to weak. Replace it or take it to a shop or them to replace it