i have an 91 crx with a ls engine in it. every so often i'll go out to the car (usually after it sitting for hours) and turn the key and nothing happens. All accesories work and there's no clicking or anything negative, simply nothing happens. The car wont turn over nothing. Its as if there was no battery.

This only happens once or twice a month. I have to hold the clutch in and the key to ignition for up to five minutes (me sitting there with key in on position) for it to finally turn on.

Other times I'll sit there with it, holding it so it'll turn on and I'll give up. Then I'll come back x amount of minutes later and it'll start right up.

doesnt seem like main relay problem, what else can it be.

 

Ignition switch, starter solenoid, clutch interlock switch, loose battery cable(s), corroded ground.