Car will not fire up

IF it is starting on the starter fluid the ignition is working as you have spark to fire off the aero start, check fuel pressure sound as if you have no rail pressure and if injected just ensure that you have injector pulse as well, you can test this with a test light at the injector connector it should pulse on and off when you crank the engine over, ideally this should be done with a tool called a noid light.