Took the truck mudding last night. Was out for a couple hours. Went to go back out and I had a complete loss of power. The truck will start and idle fine. No codes were thrown. There is no back pressure from the exhaust and the intake is working extra hard to get air. There is no sound coming from the exhaust (My muffler is cut off and the truck is loud) The motors not knocking and will only rev to 1500 rpm. There is a loud sound like there is a lot of air blowing out of the motor somewhere when its revved up, but we couldn't find anything. No oil leaks, no coolant leaking. I checked the oil and found no water. There is coolant in the radiator and the motor never got hot. Iv checked everything. The only thing I haven't done is a compression check. Will do it tonight. The truck was able to pull itself onto a goosneck in 4x4 low, but it gave everything it had. Im clueless. Need some input or if anyone has had a problem like this. thanks
2004 4.0 5-speed 4x4
(truck specs in signature)

 

I would check the cats. Sounds like maybe you busted one up really bad and it plugged up the pipe if nothing is coming out your exhaust. My first guess..

 

Good guess, cat was busted bad.