I need [B]HELP[/B] anyone!!! this is my problem..I got a CEL "misfire PO304" this is what i did,I changed all the spark plugs..then drove it around then the CEL came on again and it read "misfire PO304" again..so i tryed switching up the #4 coil to #2 coil..drove it around for a couple blocks then the CEL came on again..NOW I DONT KNOW WHAT TO DO??? [B]PLEASE HELP [/B]