BMW IX - Arthur
Has anyone any idea or experienced a similar problem to mine re my 525 IX. with the throttle set in any gear it jerks or kangaroos. When warm it hesitates when setting off and has a flat spot when excelerating after changing gear. slight jerkiness slowing down using the engine as a brake. New spark plugs but do different. Suggustions please.
Re: BMW IX - John Slaughter
Arthur

Sounds like a significant air leak somewhere in the induction system is leaning out the mixture.

Regards

John
Throttle potentiometer? - David Lacey
It is possible the throttle potentiometer has become disconnected or inoperative.

Perhaps in this case, it would be prudent to seek out a competant BMW Specialist and arrange a diagnosis.

Rgds

David