My truck is running really bad, checked the underhood fuel gauge and when truck shuts off the gauge drops to 0 within 10 seconds. I pulled the return line and plugged it. Fuel pressure still drops but much slower. I have the regulated return setup with new stage 2 injectors. Truck has also been sitting for a year. I smelled a little diesel after driving it for a while but dont see any under the truck. i tried cycling the key a few times to look for leak and cant find anything.