Injectors bad possibly?

[MTatsch]

'03 doesnt want to start sometimes when warmed up 5-7 sec cranking before it starts and it blows a little blck smoke at idle. (stock everything)

 

[Smokin Joes 2500]

'03 doesnt want to start sometimes when warmed up 5-7 sec cranking before it starts and it blows a little blck smoke at idle. (stock everything)

Worry more about the white-bluish smoke accompinied by rough idle and long cranking to start. Also check oil level to make sure fuel isnt leaking into crankcase. VP-44 trucks had junk lift pumps we have junk injectors GO FIG

 

[Lightman]

'03 doesnt want to start sometimes when warmed up 5-7 sec cranking before it starts and it blows a little blck smoke at idle. (stock everything)

Mine does the same thing, what works for me to make it a little shorter is to turn on the key and wate 2-3 sec before trying to start the engine