I have replaced everything that I can think of crank sensor cam sensor coil ignition switch tumbler I have finally finished building this truck after two years and it's ready to drive and ready for paint. The truck will crank all day long but my fule pump gets power intermittently to give me pressure and I get no spark when it cranks I have power running to the coil but no spark and what else I find wierd is that my check engine light comes on when I turn the key into the on position and turns off only some times!! my pcm is two years old and it's a Mopar performance one. And when the light come on sometime s it's vary dim like I'm not getting proper power any one have any idea what's going on ?