I have a 2004 3.0d and out of the blue the performance has become laughable, up steep slopes I need to floor the pedal to ascend whereas before the torque and acceleration was superb. From a standstill it is a shadow of what it used to be. At standstill and on revving I cannot see any black smoke from the exhausts, just wondering if the diesel I put in it was below par or whether I need to add redex?or could the turbo have packed in? it has 31000miles on the clock any ideas would be much appreciated.ta