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running lean
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  1. 9-3 Sedan, Cabrio '04+, Combi, 9-3X Workshop
    Hi All, Like many of you I have been having ongoing issues related to braking performance with my 9-3 Aero V6. After doing a bunch of diagnostics I was able to isolate the cause of my vacuum leak in the brake booster circuit and the answer is not good...the booster itself is leaking vacuum...
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