Hi guys an gals, im actually asking for a friend who hasnt been able to get an answer from many people. The car is as above, it was chipped over a year ago to 170bhp i believe and was fine, it also had a new turbo last year and a new clutch and dual mass flywheel, the problem is that when you put the engine under load ie 6th gear at about 60mph and put your foot down it judders back and forth, if you do it up a steep hill say in 4th at around 30mph the judder gets quite violent, the car has been on the audi computer and shows no faults, a mechanic suggested a problem with the injectors not seating properly and others say its the dmf or turbo which have already been changed, its on about 140000 miles so is quite high, has anyone experinced this problem as its becoming a nightmare