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Highway driving for a few miles then gradually downshifts so that I need to pull over
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11-14-2025, 11:06 AM
andrewwynn
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Join Date: Jun 2015
Location: Racine, WI
Posts: 12,449
You mentioned vacuum disrupted.
That's the symptom of the check valve at the booster failed.
–awr–
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2011 E70 • N55 (me)
2012 E70 • N63 (wife)
andrewwynn
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