My 1997 crv starts fine cold but once warm and shut off doesn't like to start. It will start immediately after shutting it off but if it sits for 5 or 10 minutes it will crank but not start. Certified Honda service center replaced the main fuel relay and thought that was the fix. It has 285000 miles on it and runs great when I can start it. I have been able to push the gas pedal to the floor and have it start but it struggles. Any suggestions would be great

 

Welcome in,it sounds like a heat soak issue,several years ago I had a1969 Plymouth Road Runner with that problem,turned out that the fuel line was too close to the headers(exhaust system) and was actually boiling the fuel,I moveed the fuel line and insulated it and problem solved.try to see if your fuel line may have moved slightly or the insulation has worn away from the line,if so try wrapping them .hope this helps.