I'm not sure what's wrong here... but when I'm on the gas, or even in gear letting it wind down the RPMs... I hear a high pitched whistling noise coming from the engine bay. Its really noticable driving through town because the sound echo's off of parked cars and buildings. I popped the hood and played with the throttle a little and noticed my VANOS is growling/rattling at higher RPMS, like maybe 2500-3000. Any advice here? I'm going to a mechanic tomorrow morning to have it checked out. How much is a new VANOS unit, I heard upwards of $800 at the dealership from a friend of mine. But I'm not sure how true that is.
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