Hi Folks
I have a NEW (well 8 months old) E65 730d SE UK version with the 238BHP turbo diesel + Auto.
The power and torque is phenomenal compared to my old E38 740i but there is a persistent flat spot or hesitation when pulling away from a rolling start.
Example..... When cold no problems as I feel that the extra fueling on a cold engine covers this problem but when hot try to picture this.
30 mph lift of the throttle and on the over-run let the car slow to a reasonable speed to say exit a side road or when rolling up to the entry to a round-a-bout (not many in the US) and if the way is clear floor the gas pedal and NOTHING............... then Varoooooom! with neck snapping acceleration!Now my theory is that on the over-run the fueling is cut off to lower emissions and aid fuel consumption. This will, in effect, reduce the exhaust flow to the turbocharger and slow it down so no boost. When I floor the pedal it take some time - say a second or two to get the turbo spooling up and Varooooooom!
Off we go again.
Has anybody experienced similar situations?
Anybody got any ideas that might cure this trait in such a lovely car? Sir Hugh of Bognor