Car is a 90 civic EX Auto, it will not start when hot, can start when cold , park car come back in 30 min. car will not start, replaced the Main relay did not help could
it be the Starter??

Thanks for any help Richard.

 

check for loose grounds..

I know you said you replaced the main relay, but do you hear the fuel pump priming when it won't start?

 

Check the coil. i had the same problem with my 95 b16 4dr. If the coil is in the disributor i have heard a hundred times it was the coil. They tend to over heat and shut off. Just tap the cap and go MSD external coil. i got my kit for like fifty buck at a parts store. Hope this helps!

 

Was it really the coil? because all this time i've heard that its the ICM that goes bad when it heats up and then doesn't let the car start.

If its the ICM then you may as well just buy a new dizzy, the coil can be had for about fifty bucks last time I checked. Get a multimeter and test them!