I just had a replacement engine fitted(47k miles), my 140k one fell victim to the swirl flap problem that doesnt exist according to BMW.
When running at say 30mph and I put my foot down it goes great, really quiet too, and the mpg is superb, 42mpg at 70mph, measured over 50 miles.
Problem is when I am setting off, it makes a nasty rattle and will not pick up speed, unless I floor it. this especially on a hill, better on the flat.
I can press accelerator and nothing happens, not even fuel usage guage, but if I,m in neutral I can press pedal and it revs sweetly. I did think of pedal potentiometer at first.
I swapped the pressure controller and long vacuum hose, also replaced maf but secondhand one.
Any thoughts or suggestions please
, this one has been de-flapped by the way.