Is it the n/a or the 20vt6 that's not starting? If the n/a, is it a 16v or 20v?
Is it turning over OK or doing nothing at all?
What exactly are the code and injection lights doing?
Both should come on, go off and stay off during cranking. If they're not coming on, staying on or coming back on during cranking that helps to identify the problem.
Also, can you hear the fuel pump priming when you turn on the ignition?