Please check your tensioner alignment marks.
Here'* my UPPER tensioner (you don't have this one) to use for reference:
Note the scale on the black portion. This is shown UNDER tension. You want the arrow to line up with the vertical line just to the right (ideally). Shoot for the area between the two nearest lines (the smaller of the two 'scale sections). Think of the wider zone as 'bad', and the narrower zone as 'good'. If you are in the 'bad', replace the entire tensioner. As you can see, the part number is on it. Yours is different than the one pictured. Go by your number.