what would cause my acura not wont to start unless you hold the key .... on 1991 Acura Legend

you have to hold the key betwwn start and the on you hold it and it runs reat you let go and it will die any ideas would be helpful thanks in advance....

Asked by for the 1991 Acura Legend
Failed electrical portion of the ignition switch. May only be available as a complete assembly with new lock cyl. If that's the case , so you don't have to mess with getting keys programmed , just swap the electrical portion.