So if anyone hasn't seen the august 20th trail ride in the rocky mountain regional section, I am having a fuel issue that seems to be heat related. 2 or 3 times while doing the trail, the truck would sputter out and die. During these times, I had zero pressure in the fuel system. Before anyone chimes in with "were you outta gas?", both tanks had atleast 3/4 in them, and I know that both senders work. Switching between tanks wouldn't help, and physically touching the inline fuel pump told me that it was only around 95-100 degrees. (I have a very young daughter, and the pump was no hotter than her bath water... yes, I have a temperature calibration in my hand... lol)
The pump was also trying to push fuel, I could hear it runnimg the whole time.
The only thing I can think of is a vaporlock/fuel boiling situation, as the truck would fire after 15-20 minutes of sitting. The pump would change it's tone as soon as it actually made the 58 psi required, and then the truck would fire right off.
This only happened at crawling pace, and never at speed. I drove the truck more than 70 miles back to the house, completely hiccup free, ran like a champ.