Focus Fanatics - View Single Post - Zetec owners: Exhaust time!
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Old 06-23-2012, 02:55 PM   #123
cyfocus01
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Join Date: Mar 2012
Fan#: 95790
Location: ankeny, IA
What I Drive: 01 silver zts sedan

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when you all O.R.P.ed your exhaust, did you have to flash/reprogram or did PCM figure it out and not throw codes? Just wondered because I know mustangs need MILs or reflashed to avoid the dreaded check engine light.
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