2001 Spyder GT
I did what you guys have said. Filled the rad (just water) to the top of the neck and the overflow to the cold mark. The gauge shows it gets to the three-quarter mark and then drops to just below half. Then, when I stop, it pukes out onto the road. Has done this repeatedly ... I have no clue why this is happening. When I changed out the intake, that got rid of my fast idle and the car runs really well other than spilling out the coolant.