Hi all my car for the past month or two has had a sputter when driving at low rpms. The last few days the low rpm stutter has smoothed out and the car now bogs and sputters really bad at anything over 3000 rpm. The car will not drive at highway speeds anymore it just sputters and stalls. The car was throwing many codes at first but now is consistantly throwing a P1000 and P0190 code which says fuel rail pressure sensor when i look it up. but has a list of things that could be the problem including the sensor itself. I do not know much about this sensor and what it does so i tested my fuel pressure on the rail and it is reading low at a constant 28 psi. Does any one know if this sensor can effect the fuel pressure and could be the problem or is it my fuel pump. I have changed the fuel filter within the last six months and also have a walbro 155 fuel pump. my car is a 2001 mustang gt sohc.