Did you check and see if there was oil in the plug hole ? That will and can cause a misfire. It comes from a leaking o-ring in the valve cover . When I changed all my plugs some had a small amount but I have heard of some leaking badly enough to cause a misfire . Just a thought , pull the coil off and look down in the hole to see .
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Previous Vehicles
1970 Impala 2D 350/300
1972 Buick GS 350
1967 Pontiac Firebird 326
1969 Chevelle SS 396/375 I really miss this one
1966 Chevelle SS 396/350
1978 Plymouth Fury 440
1982 VW Scirocco ( Got married )
1987 VW Scirocco
1992 Ford Taurus V6
1996 Dodge Intrepid
2002 Dodge Intrepid
2002 Mercedes ML500
2010 Camaro 2LT
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