wont start but turns over strong???

sounds like what happened to my car. Does it have a ballast resistor? if so replace that and try it

That's what I was just going to suggest. I started the Valiant this morning, let it run for a bit, put it in reverse and it died. Wouldn't start for the life of me. Pulled a known working one from another car, swapped it over, started right up. Looked at the old one and it had burned right through.