I have changed my ignition switch & now the car will not start does turn over on 1999 Honda Accord

when i bought the car i didnt notice the key was very loose & on the way home car quit twice so i changed the whole switch now wont start but turns over. I cleaned battery conection & boost still nothing

Asked by for the 1999 Honda Accord
Did you notice if the green immobilizer (key shape) light is flashing? ......................