Originally Posted by Myron's
I would suggest a clogged catalytic converter. But I don't know how you could verify that w/o just changing it.
Thanks for the input. I did consider the clogged cataylic converter and the fuel filter. I changed the fuel filter. It still had the misfire. Then I took it to the shop, the mechanic told me that when i replaced the spark plugs, I cracked the spark plug on cylinder 5. I also found out the my truck has a straight pipe?