Need help, 3rz running poor

We went out to play in the snow today, about an hour into the trip my truck started falling on its face.

The best way to describe it is a cold two stroke being forced to run, eventually it would "hit pipe" and come to life.

Essentially running very poorly, low on power until 3000-3500 and it would intermittently wake up and start making power.

I have cleaned maf, iac, replaced tps (A/M), replaced both coils, plugs, wires. Fresh head with about 30k on it. The maf and iac have been problem free for about a week. Zero issues until today.

 

Codes?

 

Sounds like you knocked the air tube loose from the MAF to the throttle body or you have a leak between them. Take the air filter off and look at the air filter, did it collapse, is it soggy or did you ingest some snow/critters and get the MAF dirty?

 

No codes, I'm very surprised!

I will double check for cracks in the lines but it's all on. Snow on the filter is possible, I need to look into that.

 

I tried driving with the MAF unplugged, the problem was worse. Driving with the air fuel sensor unplugged was a little bit better.

I'm trying to figure out how to diagnose this and not just throw parts at it.