I have a 1990 Accord Ex that ive had a lot of trouble starting lately. Its usually only when it has sit outside in the heat for a while. It turns over great and will either start and die imediately or just wont sputter at all. Usually once you get it started then it will start fine after that as long as you don't leave it out in the heat for too long. When its cold in the evenings or in the shade it starts up great.

 

Have you checked the main relay for cracked solder joints?

 

Where is that located?

 

There's been alot of these types of post lately, probably due to summer heat.

Here is a link, click on Main Relay:

http://techauto.bravehost.com/

There is other info. in the FAQ stickies up top. Search will also net you alot of info. in the future.