I have a 97 ram that i just replaced the head gaskets on. After I got the engine all back together I started it to make sure everything was good. It started right up and I let it run about 30 seconds then shut it back off. I finished up with the radiator and know it wont fire. For some reason Im not getting any power to the coil? It ran then after I put in the radaitor it has no spark? Any help would be great. Thanks