cannot start on 1991 Honda Civic

I am having problem with the ignition. I am the second owner, has 109K miles, automatic. The car sometimes cannot start, in any weather condition. I have change the starter, ignition switch and battery. I have check the wiring, fuses, no problem there. What else could be the problem?

Asked by for the 1991 Honda Civic
1 answer
I see all the manufacturers selling neutral safety switches and they will keep the vehicle from starting also if its a manual transmission the starter/clutch switch could be failing, Napa has both of these switches $45 clutch switch and $80 to $90 for the neutral safety switch.