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Old 10-07-2016, 07:23 AM   #20
JFP in PA
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Join Date: Feb 2005
Location: It's a kind of magic.....
Posts: 6,614
If you are getting P0300 series misfire codes, your coils or plugs are most likely the issue. I'd start there. And if this is the case with the codes, the Durametric is not going to tell you any more; you need to start doing close up diagnostics to ID the source.
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