Black box called Resonator - General Forum

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Black box called Resonator
Friday, November 22, 2013 4:02 PM
I have a 2004 Pontiac Sunfire in which gas is leaking out of the little button in the front of the "resonator" and I am wondering if that is because of a leaking fuel pressure regulator? What does this black box do? It is between the engine and cooling fan/radiator.

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