If your cars engine is turning over but not starting it could be a number of things.
First check for a fuel pump shut off either in the trunk of the car or under the drivers seat.
Sometimes just resetting that safety shut off can cause your car to start again.
If not then you could have a fuel pump problem or even a bad ground connection to the fuel pump.
Other causes of a cars engine not starting is bad ignition control module, faulty spark plugs, bad ignition coil or ignition coils and even a bad distributor can cause your car to not start if it has a distributor.