My 91 accord will start and die as soon as I let go of the key. If I hold it in the start position it will run but dies when I let it go.

It may just be an ignition switch if it runs when in the "start" position. You need to check your ignition circuit out. Another possibility is it may be a relay. So start at the ingnition switch and work your way out of it.

My father has a 91 honda as well. It was doing the same thing. My mechanic told me to turn the ignition to the on position and if your dash lights like your check oil, check engine, seat belt lights are not on, then it's going to be your ignition switch.