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Lacpac · 08-07-2023, 10:50 AM

Probably resonance. If you move the hose while idling you may hear the resonance change. I twisted mine and retightened to change the pitch.

08-07-2023, 10:50 AM	#4
Lacpac Drives: 2012 Crystal Red Tintcoat RS Join Date: Apr 2013 Location: Northern Illinois Posts: 491 View My Garage	Probably resonance. If you move the hose while idling you may hear the resonance change. I twisted mine and retightened to change the pitch.