I have a 2000 honda accord. I drive it for about 20 minutes and it shuts down. I have changed the following parts... Master Relay, distributor cap, plug wire and plugs. EGR valve, Idol control valve, catalityc converter. Any suggestion?? PLEASE HELP!!

Change the Ignition Control Module (ICM) and coil:

https://www.askmehelpdesk.com/cars-trucks/faq-how-troubleshoot-repair-maintain-hondas-selected-other-vehicles-46563-4.html#post265896

Here's what the ICM looks like:

http://shop.advanceautoparts.com/ProductList.aspx?PartType=194&PTSet=A

Here's what the coil looks like:

http://shop.advanceautoparts.com/ProductDetail.aspx?MfrCode=BOR&MfrPartNumber=E686&PartType=190&PTSet=A

This should solve the problem.