97 grand cherokee won't start

i need some help. i have owned my 97 grand cherokee for two and a half years now, it has ran prefectly, even though four wheeling and towing a boat. on a recent trip the the mountains in my jeep i was comming out of a windy part of the road in to a town. i came to a stop sign and the jeep died no sputtering. i tryed to start it with no result, it turns over fine but it is getting no spark. i changed the coil and the crank position sensor it still has no spark. i do not know if the check engine light came on or not before, i wasnt paying attention to the temp gauge ether but when i poped the hood the overflow for the radiator started spewing. i had to have my car towed home now but i would rather fix it myself i cant see spending hundreds when i am capable. its a 97 with the 5.2L and 110000Mi any help it awsome!