calbyd

hi everyone, I have 97 suburban that cranks for a good 5 seconds when warm. When its stone cold in the morning, fires up with half a crank. when its right up to temp hot, shut it off for 10 mins, fires up right away.....but when I shut it off and go back 2-4 hours later...it takes a good 5 seconds to start. as it starts it kind of slowly takes off and starts. the injectors were changed to the updated ones, new fuel filter, coolant temp sensor, cap, rotor, wires, plugs , coil. I bought the truck with a blown tranny replaced it and did all this work before driving it, so im not sure if this problem was there before. it runs awesome, lots of power. just extended crank times when warm.....if anyone had and ideas please share. im leaning to fuel pump relay or fuel pump itself.....