I haven't been diagnosed with gastroparesis, but I have Crohn's and no colon (I have an anastomosis called a j-pouch created out of ilium) . . . and ongoing gastric and intestinal issues. I have been told that when my gut slows down and feels backed up to cut out fats as completely as possible. I go on a liquid diet for as long as it takes, and do abdominal massage (gently) . . . as often my symptoms are due to partial blockages.