engine not starting up need help fast(monday)

ok long story short i drove 3 hours to show me showdown and on the way back pulled into a gas station turned the truck off and then it wouldnt start replaced the fuel pump and it is getting gas to the engine i am just wanting to see what could the problem be i check the mass air flow sensor. it is a 94 22re

Sure does pay to have an OBD scanner. Check for spark.

Cranking ( turning over ),but not firing?

yea it is turning over all day but it is not starting i have no idea i was thinking it could be the mass air flow sensor so i am going to try that if there are anymore ideas let me no