My 2004 Monte Carlo 3.4 won't stay running. It runs for maybe a second before stalling. Siphoned out all the old gas and put fresh gas in. I also replaced fuel pump, filter, pressure regulator, cleaned the injectors, new spark plugs and wires, ignition lock cylinder, and ignition switch, as well as battery. The car only stays running if I constantly spray starter fluid into the intake. The security light is on the dash but its not blinking. (not sure if that's normal). If anyone knows a possible problem/solution, I'm open to all suggestions. Thanks.