ok so driveing down the road everythings fine than the add coolant buzzer and light coes on i am 2 mins from home get there cars cooling off. afer that i got outside to check it out.theres a puddle from where the coolant overfilled into the puke tank and now its dose it iif i drive for a long time whats wrog thers no white smoke its just pushing out of the overflow tank.

 

Bad radiator cap maybe?

 

sounds like what my car was just doing.. it was a coolant seal. easiest way i found to test is to get a block tester from napa. its like a test tube with a one way valve that holds a blue fluid. you put it on your rad cap while its running and suck air, not coolant through the fluid. if it turns yellow, there is exhaust gasses in your cooling system..there like $40.. good luck

 

I've used those in the past as well. They work really well.

I still vote rad cap though. If it's not holding the pressure in the system, it will bleed off into the overflow as soon as the coolant starts to expand. And it also defeats the coolants ability to do its job (the pressure in the system lowers the coolants boiling temp).