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Message: [QUOTE="PABowhunter, post: 1169365, member: 8037"] Well I made it home without any further issues. Want to put in a good word for Curtis from Vision Diesel (who I bought the fuel system from). I texted him on Saturday and he called me back within two minutes to help me troubleshoot it. I'm still a little confused about a few things, but everything seems to be running fine now. Here's the long version. Maybe someone can point out something I'm overlooking. I went to start the truck on Sunday morning and the fuel pressure came right up to 67 psi. Started the truck and all was good. I quick crawled under and took a voltage reading at the pump. was reading around 8 volts. Then I heard the pump groan (truck is still running) and the psi dropped to 0. Crawled underneath real quick and took another voltage reading. Got 5 volts this time. This didn't make sense to me so I turned the truck off and started taking voltages further back. The relay for the pump gets its power off the drivers side battery. I took a reading right at the battery and got 9 volts. Checked the passengers side and got 12.5 (all the wires were still connected). Started the truck again and took voltages at the drivers battery: 6 volts, passenger battery: 14.5 volts, and alternator: 14.5 volts. At this point my mind is going to the batteries or cables now instead of the fuel pump. I knew there was an autozone about 2 miles away so I drove the truck over there and had them test the batteries. The drivers side showed it needed to be charged and the passenger side checked out good. They charged it inside for an hour and everything checked out. I put it back in the truck and checked my voltages at the batteries and pump and everything was good. At this point I just put the hammer down and got home as fast as I could. Fuel pressure never dropped below 65 psi. I did see the gauge flutter a couple times (which it normally never does) but only 1-2 psi. Today I looked around the truck some more expecting to find a bad connection between the batteries. I was guessing the drivers side battery didn't get charged and the fuel pump was the only thing connected to it which in turn drained it over time. I disconnected the positive connector cable and ground cable and the voltages all checked out. Didn't get any drop from the passenger battery. The voltage at the fuel pump was reading 12.5 with it off and 11.25 with it running. I gave all the terminals and connectors a good cleaning when I was done. I'm saying it was just a bad connection between the inside of the connector and the terminal. Unless I'm missing something.... I have a couple other questions on the issue too: 1. How was my truck still running, and running well, with 0 psi of fuel pressue? Will the large volume of the lines make up for this? 2. Will running a pump at a lower voltage for an extended period of time harm the pump? [/QUOTE]