Weird problem, not sure what to think
So I had something interesting and frustrating happen this weekend. I was up in Grand Lake (in the mountains of CO) this weekend. I had the cabin plugged into my truck last night. I went out to start it about 9am and it started up just fine. I put my tuner on high idle and let it warm up for about 10 minutes.
I pulled out the drive way and started to back down the drive to hook up the snowmobile trailer and my truck started sputtering. I gave it some gas and it sputtered and shook and turned off. I tried to start it and it cranked just fine but seemed like it wasn't getting enough fuel, or any at all. I pulled the fuel bowl cap and saw plenty of fuel but it seemed like the bowl had a slight vacuum. I put the cap on the truck started then sputtered and died. It then would not start and I drained the fuel bowl and cycled the fuel pump a few times and then tried to start the truck, and it just cranked. I came back about half hour and jumped the truck, I figured the batteries might be a little low. I cycled the key a few times and could hear both fuel pumps "working". I started the truck and it died after 30 seconds. I cycled the pumps about 5 more times and started the truck. It idled just fine. I took off the jumpers, the truck ran fine. I had no more problems and drove it around the rest of the day and made it back to Denver (170 miles) just fine.
Anyone have any thoughts on this. Everything pointed to the fuel pump for me, but that seems to not be the issue. I'm not sure where to go from here....