ive got a 93 z28 123*** miles on it,cold air intake,msd 6al,and cat back.Ive notice that it pushes coolent out when I fist start it up out the over flow.Ive done a prasure test on the coolent system and ive got a small leak but nothing on the ground,check all hoes.No smoke out the pipes but does hestat after siting awhile.Havent checked the heater core yet,and one more,my ldle hangs untill I go to a complete stop then falls back down, ive cleaned the iac.Thanks

 

the same thing is rong with my car can some one help use but mines as soon as i start the car it get super hot all the way in to the red can some tell me what i need to do