On Dec 3, 2012 11:43 AM, "Dan Penoff" <d...@penoff.com> wrote:
>
> Everything appears to be tight and lined up. No slop in any of the
pulleys that I could find.

Total guess, but bad engine mounts leading to shake at idle?  Or, does son
usually drive with windows down in summer?  Might the compressor pulley be
shaking slightly under load?

Best,
Tim
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