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Originally Posted by tadams11201
It is not throwing any codes ande being as it runs like it should stock WITH the performance setting, I would assume that it isn't a misfire. Please help.. cannot find anything on the web related to this. 2005 f150 5.4l
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I might just be having an off morning but what does stock with performance settings mean??
All the things I had thought of looks like its been done....cats, O2's....Dont really know what else to suggest.