Quote Originally Posted by EmminoDaGreat
Usually happens when the ground on the thermostat is not hooked up/loose, as well as the one on the transmission to chassis..
x2
The engine is using that one small ground as the ground for the starter. You gotta remember how big the battery cable to the starter is and how much current goes through it. You should have a cable from the battery to the engine and one to the frame. And then the one from the V/C to the radiator support.