[Cdshinne]

I had this problem on my 2000 5.3 with the same hot and cold start symptoms. Everyone on this sight said fuel regulator, but i ignored it because it was replaced with a dealer fuel regulator a couple years ago when the problem first started, and the vacuum hose didn't have gas leaking out of it. Long story short I finally listened and bought another fuel regulator and it fired right up! 9 out of 10 times its your fuel regulator