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Old 04-02-2014, 08:30 AM   #7
mikesz
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Join Date: Feb 2013
Location: Cranston RI
Posts: 899
Garage
when i had a strange hissing noise i found it was the vacuum hose that connects to the brake booster. Once i popped it back in it was fine. Its in the front trunk lower right had side of the brake booster. I have a 99
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99 Porsche Boxster
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