Jeep if you are in Cal. or AZ some place hot it could have a vapor lock, my HD use to do that every so often, couple of times in Eastern Montana it was 114f , it had a vacuum operated pet cock from the fuel tank, I went with a manual pringle one and problem solved, but yours should not be this. I would start by checking your fuel lines make sure they are all good, hope it is not the in tank pump.