Ford explorer fails to start

My '95 Ford Explorer fails to start back up after it’s been driven awhile. I don’t recall it ever not starting up first thing in the morning. This doesn’t happen too often, usually only once every other month or so. However, the last two nights it has done this. It turns over, but it sounds like it’s not getting enough, or the right mix of, fuel. Last night after letting it sit an hour and a half, it started up just fine. The night before it didn’t start up after that amount of time and I left it until the morning when it started up again. Any suggestions for a solution? Appreciate any help you can send my way.

Chuck