Sometimes my car will not start and I am not sure why.After driving if I cut my car off to go in a store or whatever my car might not start up for a while.It does ALWAYS start it just might take a hour.Sometimes it does this before it has even run for the day.1991 Honda Civic (Frankenstien)92 Block and head.91 Si intake manifold and ecu to run it.90 CRX tranny and clutch.Hey I am poor and these were great upgrades from my duel point dx with a bad cylinder(sp)Any ideas would be great.Thanks

 

From what I've learned it could be either a bad ground or could be too much heat under the hood (ie cooking the starter and a problem I'm having)... do you have a header?

Suggestions:
Check and/or clean your connections first, but disconnect the battery before inspecting.
Wrap head if you have one, or get a heat shield for your starter.
Get a new starter.

2 cents from a poor, white boy.

 

check the main relay because in very hot weather the solder in it will disconnect. check on google and it will show u how to repair it

 

That sounds like a classic case of the main relay on its way out.

HERE is an awesome writeup on how to replace it, complete with pics.

To make it even easier (if you don't want to resolder the dry solder joints), you don't have to remove the housing that holds the relays electronic bits. You can simply pry the case apart on its short sides with a butter knife or small flatblade screwdriver, one side at a time, and work the guts of the relay down past the clips that hold it in the housing. Slap new guts in (or resolder the old unit if you're handy with a soldering iron. I'm not), plug the clip back into it, reconnect the battery negative cable, and go driving!

Mike