I have a 2007 f-150 showing misfires on cyl. #3 and 4 and you can smell raw gas from exhuast. I have install a new set of sparkplugs and a new coil on cyl. # 3. Truck still has same issue, what is the problem.

 

I had the same problem in my '06, the dealer replaced 3 coils, all the plugs, fuel filter/lines...then ended up replacing both catalytic converters which ended up fixing the problem. Luckily it was under warranty. Good luck, hope it helps