Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum - View Single Post - whistle sound during acceleration
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Old 06-14-2013, 01:30 AM   #16
Dan3906
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Join Date: Jun 2013
Fan#: 115748
Location: Walsall, United Kingdom
What I Drive: 2006 ford focus st white modified

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Hi my focus st does the same I have upgraded the exhaust and put induction kit also had it super chipped and remapped and every time I accelerate I get a whistle flutter sound it dies down when cars warn tho
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