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Code #PO278 6 LITER PWRSTD

12545 Views 7 Replies 5 Participants Last post by  FamilyRide, 
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I have a 2003 f350 with the 6.0 liter Powerstroke and it is running rough at idle and is missing as revved up. I pluggged the scanner in and it pulls code # PO278,CYL 6 Contribution or balance fault. How do I repair the problem and just yesterday I plugged the scanner back in and it pulled the same code ,now its Cylinder #7. Thank you in advance!
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Thank you for your reply and if it were still under warranty I WOULD HAVE DONE THAT BUT SINCE IT ISN'T i THOUGHT i WOULD ASK.
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