As above guys drove it today and was great pulling hard and then earlier on just seems to struggle I can hear turbo but when looking at rev counter looks slow and if I put it in 4th and foot down hesitates very slow any clues please

 

did you open bonnet and inspect pipes?

 

I didnt mate too dark but on idle sounds fine no hunting or owt set off put in to second out foot down boost builds up then just seems so slow though rev range and like turbo has run out of steam at 4k

 

Ok an update been playing up all day then all of a sudden power cam out of no where any clues guys much appreciated