Focus Fanatics - View Single Post - Rich bank one P0172 code and poppy exhaust
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Old 11-01-2012, 05:21 PM   #2
joescool2008
Focus Jr. Enthusiast
 
Join Date: May 2011
Fan#: 85574
Location: Brazil, IN
What I Drive: 2002 Focus SVT, 2013 Black ST2

Posts: 25
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I wouldnt run any other plugs than oem replacement motor craft platinums or coppers. Ford didnt tune your car for those high performance plugs and this causes issues. Also it seems like the O2 sensors break pretty easily from clearance issues.
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