and just to add the car doesnt always go into limp mode at high revs, again on the test drive it was fine as I gave it a good test (spent most of the drive on the redline) as I knew this was a common problem with these cars. also I it does need a new crank pulley as it is quite noisey 95% sure its not the DMF as its not coming from the gearbox side and there isnt a change when clutch is depressed, i'm not sure if this can be related to the rough idle??