Problem with fuel in HHR

Rebuilt a salvage 06 hhr with the 2.2 engine, it was hit above the bumper
it broke litely the plastic intake and air regulator, replaced both of them
but upon cranking it up I hear the pump when ignition is switch on it buzzes for a few secs etc, but no fuel in injector rail, and muffler has fuel leak as if it is coming back from the engine, now it does turn on but very shaky for about ten seconds and cant be accelerated, and when I bought it the tank was empty. Any ideas could it be an alarm cutoff hidden, or is it flooding itself, I may have had a hard day building this one. Help me out.