the engine started not wanting to accelerate

I was driving down a dirt road in the country, turned a corner and the engine started not wanting to accelerate. At first I thought it was traction control, not that, It slowed down to an idle. I was able to keep it running and by working the gas pedal slowly got it back to the farm shop. It did set codes after running poor for about a mile. P0300, P0304, P0306. Engine miss codes. Changed the spark plugs and looked at the wires. Plugs were worn but didn't look bad. Starts and idles for a second or two then starts running poor and sometimes shuts off. Touch the throttle and you can hear the air sucking through air cleaner, filter looks new, but no engine response. While messing with it, it set a different code that I can't remember. It was a difference between mass air and O2 flow, maybe plugged exhaust. took it off at the engine, same problems. Disconnected the battery for a couple days while working under it. when I started it it idled normal run for most of an hour just idling. touched the gas pedal and same thing again.