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      07-07-2014, 09:10 PM   #1
Bklynjoker
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Vacuum sound on start up

When my AC is on and I start I get a pretty loud vacuum sound that stays on for about 5-10seconds.. ONLY if AC is on. Any clue?
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      07-07-2014, 09:31 PM   #2
serge1
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Sound like that of vacuum cleaner u mean?
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      07-07-2014, 09:36 PM   #3
Bklynjoker
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Yup. Or a dust buster
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      07-08-2014, 08:12 PM   #4
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Your secondary air pump is going out. My e39 would sound like a jet engine when it was on its way out.
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