So as of late, when I start my truck, it runs for a few seconds then shuts off. I have a mechanical oil pressure gauge and I realized that the truck does not build oil pressure right at startup. Once it shuts off and I restart the pressure builds up to 80 psi immediately. This is only when the truck sits overnight or for extended periods. I have done a bunch of searching here and on the Internets and I cannot find a concise answer. I consulted the FSM and I have a general idea of what it may based on what is listed in the trouble shooting section but before I start to delve into the problem, I figured I ask you fellas on here, maybe you can offer a shortcut to solving the issue. I just reopened the oil pressure relief valve and cut a coil off the spring and that resolved my over pressurizing issue I had for the longest time, even though I was running the extended valve. I am thinking to replace the oil filter and oil first and then see if that solves the issue.