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Evap Leak

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2004 Crew,55,000 Miles.i Was Driving Down The Road When The Truck Started Skipping,put The Computer Onit And It Said,large Evap Leak And Misfire In Cyl 4.any Comments Would Be Appreciated.
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The skipping part I am not sure but check the connection at that plug and the spark plug it's self. The EVAP leak could be all sorts of things that have to so do with the fuel system. Start by checking the gas cap and if it's tight replace it, it's a $12 fix.
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