car wont start

You need to isolate the problem to either your fuel system or your igniti8on system. Get a fuel pressure reading, a maintenance manual will have the spec, while cranking the engine. Check your fuel injectors and make sure they are working. Use a stethoscope pressed against the injector and listen for a rapid tapping sound while an assistant cranks the engine.. If your fuel pressure is low, suspect a fuel pump. If fuel pressure is good, but the injectors don't work, Suspect faulty computer. If your problem isn't in the fuel system, check for spark to the plugs

When it doesn't start, you'll need to see if it has ignition spark and fuel to the cylinders. I would also check the engine control module for diagnostic trouble codes.