So I drove my 2003 cobra home the other night to see a bunch of steam as I parked....apparently I had just started to leak a bunch of coolant. Being 1 a.m. I could not tell where it was coming from, so the next morning I let it get up temperature and it came pouring out from the small hole on the top of the cap...sort of like a pressure release hole. I swapped caps with my GT which have the same PSI rating and it didn't come spewing out. Problem solved, wrong. Took the car to get gas and it did the same thing and started to over heat. Is this just the thermostat being stuck shut? It doesn't seem like it would be many other variables....who has an answer for me? Thanks guys