98 Chevy 5.7L, Z71 sluggish to start when warm, fires off great when cold?

billy25685

New member
Got a new vehicle this weekend. Basically it runs smooth and sounds healthy but cranks for a long time and slowly revs up unless it's the first crank of the day. This morning it fires up great, at lunch the motor turns over several times then slowly comes to life. Truck has 145,000 so not bad for this model, original equipment, good gas, haven't pulled the plugs yet, recent oil change. Ideas?
 
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