Hello thank you for using FixYa.com for your answer my name is David.
You say it wont start in the normal way by just turning it on but if you pour gas in the throttle body
it will start sounds like you have a weak fuel pump most likely but there are a few other things that could cause it also .
Damaged or faulty battery and/or connections.
Coil - Ignition
Damaged or faulty ignition coil or ignition coil circuit.
Clogged or dirty fuel filter
Fuel Injector Pressure Regulator
Faulty fuel injector pressure regulator or circuit.
Improperly functioning fuel pump or circuits.
Damaged, worn, or deteriorating spark plug or coil wire(s).
Faulty ignition control module or circuit.
Damaged or faulty solenoid switch or solenoid switch circuit.
Damaged, worn, defective, or faulty starter or starter related circuit.
Neutral Safety Switch
Damaged or faulty neutral safety swittch or circuit.
Air Charge Sensor
Damaged or faulty air charge sensor or air charge sensor circuit.
Corroded, burned, or shorted fuse may be interupting power source.