2003 Honda Civic wont start.

If the only variable is that you changed the steering column, and all was well before that, then I'd be concerned out direct compatibility with whatever parts were used. Assuming the parts were used? You may want to swap known good parts from the old column... Too hard to know all the variables from here. Use this link to find some shops near you that can help with your concern: www.repairpal.com/repair-shops