starting problem

[jason leonard]

my buick when it is warm it won't start , then i stop cranking it over for a second ,then try it again then it starts. but when it is cold it fires right up

 

[UNGN]

It's a long shot, but I'll guess: Low oil pressure when warm and a bad FP relay. An oil pressure switch turns the pump on if the FP relay is bad so you have to wait for it to build pressure. The Double key gives you two prime pumps and enough pressure in the rail to run the car until oil pressure is built up.

How many miles does it have on it?