I recently over heated my 2001 mustang gt because the engine fan got stuck. it boiled out the coolant, so i replaced it and fixed the fan. I drove the car for about 150 miles and it ran fine until one morning i made it about 3 miles and it lost power and died. now every time i start it it idles rough and is slow to respond with low power. it also won't start for about and hour after it starts running like this. does it sound possible that the coolant is leaking into the engine? any other suggestions?