I've bought a 03 2.2 dti Vauxhall frontera very handy but has a problem when it hits over 2k revs it goes into limp mode.just want everyone's opinions from experience please.jeep also has just recently refused to start without a tow.have been told its the egr needs taking of and cleaning but I honestly haven't a clue so just looking for advice of people who have experienced this.would a dirty egr stop it from starting