Can the map sensor keep a car from starting?

"Yes. its a maf sensor (mass air flow sensor) and it will not let it start it will mostly just crank n crank over or start for a min with spiradic idling n shut off"

Actually, there is such thing as a MAP sensor (manifold absolute pressure) but in some vehicles (especially Chrysler-Daimler) i believe, it can make the vehicle not start.