My truck has been taking longer to fire up both in the morning and during the day when it is warm. this is my white dodge that is stock. the idle is set up about 900. I keep it plugged in at night. I just started to notice it this week. it doesn't seem to have lost any power although I have been planning to get in and move the fuel plate and rotate the star wheel on it. My suspicions are it could be the Overflow valve. have the solenoids been known to stick like half open for a bit then open up? Or could it be the lift pump? I don't even want to ask if it could be the injector pump.

 

Could also be the batteries or their connections.