I have a R56 1.6 diesel Mini with 88000 miles, it starts and runs perfectly, it accelerates smoothly until it hits 2300 rpm were it gives a single jerk or miss then runs smoothly up through the revs. The fault happens so quickly it doesn't register as a fault (the EML has never come on) There has been two very experienced diagnostic techs looked at it and neither have come up with any cures. So far the accelerator pedal has been swapped and the EGR valve cleaned. Has anyone had experience of this problem?