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      08-16-2018, 09:59 PM   #5
neepertech
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Drives: 135i
Join Date: Jan 2016
Location: USA

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So I'm thinking it has something to do with the brakes. If I touch the pedal during the hum cycle it interrupts it. I have not gotten around to pulling the vacuum like from the booster but I will report back when I do.

So possible a bad booster, hard vacuum line, or vacuum pump. any other ideas?

Thanks!
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