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Old 07-28-2014, 11:05 AM   #1
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Fluttering Noise- pulley?

My '05 focus has 163k on it and the serpentine belt was replaced less than 10k miles ago. Of late there has been a fluttering/squeaking noise when I accelerate and it tends to be worse at lower RPMs. Once I'm in 5th I don't notice it too much. The noise also seems to be louder when the A/C is on and it makes a knocking/grinding sound when the A/C is first put on. Any ideas? Could it be as simple as the tensioner pulley? This last oil change the car also used a little bit of oil which has never happened before, not sure if there is a connection.

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Old 07-28-2014, 09:06 PM   #2
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Moved to "General Technical Chat".
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Old 07-28-2014, 09:21 PM   #3
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Put a wrench on your tensioner and see if it still moves freely. It might be stuck.
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