belt squeal

I've been having a squealing belt now for a few months ever since I put this MPS on. Right now I'm running a stock size belt on a 3.6 though I have also run one for a 3.4 to no avail. It pretty much squeals at idle, accelerating, and just cruising. I have the pulley pressed on as far as it will go with the ZZP tool and if I throw on a new belt it won't squeal for a day or two then start back up, I know it's not a pulley or the accessory belt. It's driving me insane since it's so loud and won't go away. Anyone have any tips to get rid of it?

edit:
Damm1t wrong section, mods please move to L67.

sounds like the tensioner pulley is letting up too much. I had this issue for a little while but then I replaced the tensioner pulley setup.

Moved for ya Sandman

x2 i was gona say tensioner

I'll look into the tenioner. I want to say that I've replaced it before. But all the noise did start up the day I put on the MPS.

Been a while but new tensioner and belt, damn thing still squeals.