Codes P0113 (IAT sensor) and P0630, no start?

So, the other morning I went to the store, no issues. I tried to start it a couple hours later, the truck would crank but it did not start. Found the P 0113 code and located four burnt spark plugs out of the eight. They were only 2 months old, pulled and cleaned all fuel injectors and tested them, checked the mass air flow sensor and IAT sensor, which they're combined. Also checked wiring between mas and ECM wiring harnesses to ensure continuity, also checked vehicle grounds. Removed and cleaned all grounds and reinstalled, went to crank the truck. Still no start truck throws p0630 code and battery is extremely weak now from cranking and testing. I'm in a bind and need help.