After letting the car sit for 30 or 40 minutes it will start then sputter and die. Crank it and it won't start for a few tries (or many). It is not even trying to start most of the time. Its like its not getting any spark or gas.

 

Are there times when it will start and run normally? Or, does it never start?

For intermittent crank but no start, do the main relay first.

 

Yes if it has been started recently it will most likely start without these symptoms. Once running it runs normally.

Dang $72 Is this the correct part.
Relay - Fuel Pump | 1990 Honda Civic 4 Cylinders 1.5L FI SOHC | AutoZone.com

 

Generally you don't need to buy a new one. Do this instead:
https://www.hondacivicforum.com/foru...-repair-89522/