ok i have the 3.9v8 disco1 as some might be aware of previous posts of mine been working on engine.so couple of questions. redone my base idle today this time instead of clamping the pipe i took pipe off and blanked off both ends. now when i adjust the base idle screw all the way down is the car suppose to stall if so mine dont it still runs' so will this mean must be pulling in air from some were and if so were as i have checked most of the common places. question 2. put my ecu m8 on today and it is reading low fuel pressure now is this likely to be that pressure unit fitted by the stepper motor. car seems fine no probs with fuel starvation any ideas please