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Re: "wooshing" noise while pressing on brake pedal
Assuming vacuum booster power brakes, it is normal for there to be enough vacuum after shutdown for a few pushes of the brake peddle. Without any engine noise, a 'whoosh' is normal as vacuum is 'used up' when the peddle is pushed. Once the stored vacuum is gone, no more whoosh and the peddle gets much harder to push to apply brakes.
On a good booster, the vacuum can remain for many days. One of the early signs of booster failure is that it won't hold vacuum very long.
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