Ok, on my 2000 XJ i have done a fuel pressure test. With just the key on and engine off i get about 50 psi for a few moments, then it bleeds off to about 22 psi. I dont think that that is normal, but im just now learning XJ's. So i did the same test on another vehicle and the pressure didnt drop. I also did a running test on both vehicles, both held the same pressures at idle, but when i give them gas my XJ drops to about 30 psi and the other one did not. neither have the vacume opperated fuel pressure regulators, so neither one should have a drop in pressure, Right??
So, clogged filters?? Fuel pump going out?? or Pressure Regulator, which i havent found on the fuel rail or on the fuel line, so im assuming its in the tank?
So, clogged filters?? Fuel pump going out?? or Pressure Regulator, which i havent found on the fuel rail or on the fuel line, so im assuming its in the tank?