Starting Problem - Hot Engine

My son just bought a used 94 Accord LX. The first two times he's tried to start it with the engine hot, it turns over effortlessly but won't fire. After letting it set a few minutes it will start.

Anyone have this experience or have an idea what might be wrong?

Car has 217.000 miles, is fuel injected. Starts fine when engine is cold.

Thanks.

I'd start by checking the coil.

Main (fuel) relay. Lots and lots of threads about it on this forum.