Hi all. I've got an underdrive pulley and the replacement belt installed for more than a year and recently it started squealing when I run the AC. It's usually only through first and second gear. I've had ford look at it and they've said my tensioner was gone. I replaced it and also replaced the belt and still no dice. Any ideas?
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I have the same issue with my car. I changed the belt tensioner, idler pulley, and the belt. It only squeals when I turn on the AC. I notice the belt tensioner moving only when the AC on. I think it may be the crankshaft pulley, or the water pump pulley.