1994 Mercury Tracer car wont start or only starts for 5 sec

I recently put a used head on the car and the next day I drove it for a while like 4 hours then all of a sudden when I went to turn the car would shut off. Now it only starts sometimes but only runns for like 5 secs. I hear the pump and the fuel filter is clean. When I relieve the fuel pressure sometimes theres a lot spraying out and sometimes theres nothing. I recently put 30 in the tank and the trip is on 37miles