Help! Sudden Issue with 2011 TRD Off-Road

I have a 2011 TRD Offroad 4door. This truck has run like a top for the 5 years I've owned it, right up until this morning when I tried to go to work.

This last weekend I moved from North Dakota to Wyoming, pretty high up in the mountains. Thing drove fine getting here, drove fine Saturday and drove fine yesterday. Just this morning it had a VERY hard time starting and would not stay running. I finally got it to stay running but only if I kept giving it gas, otherwise it would idle at about 400 rpms until it would die. I managed to get it over to a shop about a block away for them to look at in the morning.

What could this be? It literally ran fine the same as it always had every day until this morning. The only thing I can think of that changed overnight was the weather, it got down to about 0 degrees. Could I have a fuel restriction from frozen water in the fuel? Any thoughts would be greatly appreciated.

 

Maf sensor might need cleaning or replacement