I have a 1998, K2500, 7.4 w/port injection that starts difficult by excessive cranking. The problem started out "mildy" a couple of years ago and has gotten gradually worse. It starts right fine the first time in the morning, then starts hard the rest of the day. When it starts hard it floods, and puts out some gassy smoke. Now, it also runs rough until the engine gets to operating temp, but continues to rough idle. I have my guesses, but don't want to repair what isn't broke (I most suspect the injection system).
I appreciate your thoughts