OK ..I swaped all the plugs around AND all the Coil packs....AND reset the ECU and STILL GET A MISS fire in Cyl #4 .!!

The car only has 4k on it ...ITs brand new still..
THE CAR RAN FINE ....for a month or two ..and I have not touched anything in that time.....then all of a sudden BOOM this crap happenes!!!!
What do i do from here.!?????? iF i take it to the dealer ship ..thay are just going to tell me its the ecu ### of the ( safc) !!!or something like that but thay cant look at it with out me paying ...bla bla bla ...!!!!
what do I do now? what els can i check ..HAS anyone els had this problem???
I hate this crap!!!!!
thanks alot people!!!!
