went for a little ride tonight ,when i got home i washed it and was drying it.started it up and opened the hood to wipe the water from the underhood area and i heard a strang sound coming from the blower,it sounds like their is rocks in it at idle.doesnt seem to make that sound when you rev it but you really cant hear anything when you rev it.i have never changed the stock pulley and the car has 900 miles on it.has anyone had a problem with there stock eaton blower?