S.O.S. misfire/catalytic converter???

[Space_Ranger]

So my check engine light came on, then a rough idle, check engine light started to blink and then stopped blinking. Light stayed on. I changed out the all the spark plugs and wires. Made sure everything was tight and good to go. Turned the truck back on, let it sit for a min or two and then the rough idle and flashing engine light came on again!!!! What to do next????

 

[Uncle Gump]

I would pull the codes...

 

[Dirtman]

You have a sophisticated computer to tell you whats wrong. I suggest using it.