87 4.0 hard start when warm

Hi All, new here
Have a 87 4.0 That starts very good cold. after it gets to op temp. I shut it down and if i start it right up it will start fine, but if i let it sit and then try to start it I have to hold the gas to the floor to get it to start. it is like it loads up. I have replaced most of the sensors and fuel pressure reg. any thoughts?

Thanks, Tim