My 2004 Aveo timing idler pulley broke and messed up the head. I put on a new cylinder head, timing belt, idler, tensioner, water pump. Car was running fine prior to this mishap. My new timing is correct. When I go to crank the car, it won't fire. I disconnected the fuel line and it pumps fuel when the key is turned on. Injector wires are getting juice. When I pull the spark plugs and pour in a little fuel, the car starts and runs good for about 3 seconds. It must be starving for fuel. What is my injector issue here ?