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Old 08-15-2017, 06:42 PM   #8
jcslocum
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Join Date: Aug 2015
Location: Eastern Shore, MD
Posts: 623
We chased a vacuum leak for a year before the power brake booster fully failed and revealed that it had been leaking a long time. Vacuum is used all over and the lots of tubes and hoses. A smoke test will not reveal the booster. You need to test the booster separate.
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Jon
1966 912, 1976 911
1986 944, 2000 Boxster
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