With my 2002 Dodge, when I park on a flat surface or have the nose uphill, it will take a bit of cranking to get started. I've noticed that when the fuel tank gets emptier, the amount of time is shorter to where I have to crank to get it started. Once started it doesn't have any issues, no sputtering or rough running. The repair shop thinks it could be the VP44, but I haven't had any issues with it. I do have a fuel gauge on it that I put on when I first got the truck. I did a search and found this thread to be close..but no solution that I see. https://www.thedieselgarage.com/foru...el-system.html
I'm thinking of washing the engine down to clean it, then pressure up the fuel tank to see if I can find a leak. However, what should I use to wash the engine? I'm assuming to avoid using a pressure washer? How would one pressurized the fuel tank?