1997 Honda Civic hard time starting and quits while idling

I have a 1997 Honda Civic 4-1590cc 1.6L with 222,000 miles. 2 weeks ago it was hard to start. I had to pump the throttle to finally get it started. I sometimes takes 2 or 3 times to start and sometimes it starts right up. It also cuts out when idling sometimes. I have had the fuel filter replaced and the fuel relay replaced under the dash. It hasn't helped at all. The fuel pressure is good and the computer diagnosis shows nothing wrong. Can you tell me what else I should have checked. Thanks so much in advance.

Shawn B