Common rail diesel systems are very complicated and require expensive test equpt to carry out correct diagnosis.The high pressure side of the system can work at pressures in excess of 300 bar (4500 psi),so you need to be extremely careful when working on fuel rail system.If you have not got the right gear to test the system,I would susgest you leave well alone.Secondly,most auto gearbox cars will only rev to approx 2.5 k when static.This is normal.hth