it fires but wont run

On cranking you have spark at the spark plug, so you know the ignition system is most likely OK. You have crank and cam sensor input into the computer, and the computer must be getting power and have grounds. First check for fuel pressure remove the fuel hose that goes to the fuel rail and get a friend to crank over the engine to see you have adequate fuel pressure and volume. Listen to the fuel injector, use a long screw driver place the handle end up to your ear and the metal tip end up to the fuel injector, get a friend to crank over the engine while you "listen" to the fuel injector. You should hear click, click, click as the injector is opened and closed by the computer, if the injector is not being triggered you will not have fuel getting into the engines cylinders.