Quote:
Originally Posted by wagner.a.charles
Ok, so I just left for lunch and when I cranked my car, it made that sound again. I was able to check, and the aux fan wasn't even spinning. Bad motor? When I turn the AC on, the fan doesn't come on either.
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Noise is the secondary air pump, pretty sure now from your description.
Number 1 in this diagram, Behind and below the passenger side headlight.