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    cylinder 1 misfire detected after putting NEW ENGINE!

    what's up guys, So... after having put new engine in my 2005, 5.4L its reading code as cylinder 1 misfire detected under obd 2. I know my cat went bad, and I took it out just to see how it would run, and I was wondering if that might be it or not but shouldn't it say random misfire detected...
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