2001 Ford Crown Victoria "98 vic spark" Questions

...98 crown vic in the am starts and runs great for about a min then it starts sputtering like its misfiring recent plugs and coil packs are all sparking. it had a very little amount of snow blow over ...

...98 crown viclx...just had new intake manifold installed...the old one ofcourse was cracked(class action lawsuit--ford is suppose to reimburse us w cracked manifolds--$734)...next---cylinder # 6 ...