1992 starts up but dies after afew seconds
 

My 1992 f150 302 296,000 miles ran great parked it for about two weeks had a very cold night for us (N.C. 9 degrees) and some snow came out locked the hubs Truck fired right up then died can kinda keep it going by feathering the gas pedal. I needed to do some stuff to it any way so i changed the fuel filter, PCV, cleaned and tested the IAC, replaced the TPS, cleaned the ERG, new plugs wires cap and buton. Tested the fuel presser it is at 37 pounds drops a few pounds if i can keep it running even got some gas out of the test port looks good no water and burs good. Changed any vac. lines that that looked dodgy. Do not know what to do next.