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Code reads cks and cylinder misfiring after changing all 6 spark plugs and checking the intake manifold gasket for leaks,do you think it's the coil pack?
Vehicle: 2007,Infiniti g35x, v6 3.5

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P0300 Random misfire

Yes it can be, what a random misfire is is 2 or more cylinder is not contributing, . Some of the most common cause after changing out the sparkplugs are the use of dielectric grease or the tune up grease if too much was applied you would set a misfire condition

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