Idles rough, misfire, loud and check engine light flashing

I it's been acting up lately at first I could get it to stop by taking the negative battery cable off and now that's not even working. It suddenly starts idling weird kinda high for a second and then low to where it will sometimes stall if you don't give it some gas. The engine sounds a lot louder than normal and one time the exhaust manifold was glowing red. That only happened once that I've noticed. It also will not shift once this starts happening. I can only go about 35 mph. I cleaned the EGR value and the EGR sensor valve is working properly. And if I unplug the map sensor while it's running the truck will shut down so I assume it working. It also seems like it's got more acceleration when this is happening also I'm not quite sure what to do or where to start. and it sometimes bogs at a higher rpm. also the check engine light starts flashing rapidly.
Any idea what the problem could be?