I need some help. I have a squeaking sound coming from the serpentine belt area of the engine. I have tried replacing the idler pulley, tensioner pulley, serpentine belt, water pump and the power steering pulley(broke existing one taking it off). Still my squeak persists. I see on multiple threads that it may be the camshaft synchronizer. How can I check if this is it? Where is it located on the engine? Is there anything else in this area that it could be? The sound seems to be coming...

Squeaking sound near belt in 2004 V6 3.9L Mustang