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Old 07-16-2014, 02:30 AM   #1
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High rpm misfire

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ID:	161564 my buddy has a 13 5.0 throwing a misfire code at high rpm and ford refuses to fix it anyone have any ideas what up with his car ?
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Old 08-05-2014, 09:00 AM   #2
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I would say check your spark plugs and injectors. Is the car boosted?


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Old 02-02-2016, 12:18 AM   #3
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I had same issue and new plugs gapped a little less fixed the issue. I am boosted, but even being tuned will cause it if the car is a little rich. I change plugs every 7k along with ProCharger oil.


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