this is my friends accord, he says that when he starts his car, sometime it will start but idle rough, or it wont start at all and if we wait a few minutes it will start and run. Also when he is driving and he lets off of the throttle it will die. He has changed the fuel pressure regulator and still has the same problems. Also we have looked many times and traced the whole fuel line system for a fuel filter with no results but that there is not one, contrary to what any manual or technition may say. The only fuel fitler is in the tank. So all this leads me to think that its the fuel pump. Any sugestions would be great, thanks