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I should also mention that I can hear my vacuum pump. Not outside the car but only at idle when sitting in the car. It doesn’t sound bad, as if it ready to self destruct or anything like that. It makes a subtle “chu-chu-chu” noise that goes away if not idling. I can’t say I noticed it before but I am wondering now what a new pump would sound like….or can you not hear new pumps at all?
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