1)
What is the significance that he was stricken with intestinal illness?
1.
Rashi (Melachim II, 9:29): Because he was stricken with bad illnesses, Yoshvei Yerushalayim appointed his son Achazyah to be king a year before Yehoram died.
2.
Malbim: Normally, dying of intestinal illness is a good sign. Most Tzadikim die this way (Shabbos 118b). However, he will have many such illness, and it will be disgusting; his innards will leave his body!
