Your car is starting up but not turning over could no gas be the reason?

I'm guessing that you mean it turns over but wont start. Anyway, two essential things that a car needs to run is fire and fuel. Check to make sure there is spark to the cylinders and also make sure there is fueling being supplied to the injectors or carburetor. You can check the fuel by pressing the "valve stem" that located in the return line from the injectors. It should have a little pressure to it.