i have a 96 t/a 5.7 6-speed, when i go to start cold i have to sometimes crank it for several secounds before i get it to turn over. after driving for a little bit i can turn it off and it fire right up everytime until it sits for like 2 hours, than i go to start and it cranks fast but the motor slowly gets going until it idels out or it just died and i have to restart.not a big problem, just really makes me sick no check engine light either.

 

check fuel pressure, fuel filter.