when my XF has has a bit of a thrashing for 10 minutes, the 1st 25% of the throttle pedal travel does NOTHING, The engine hesitates in all gears.... And the hesitation on throttling is the same whether moving or stationary....
The problem goes away if the engine is switched of and re started.... And all is fine until another thrashing and pushing the revs in all gears for 10 minutes......


Has any one come across this problem.... Or have any idea whats wrong?
Regards
Grant B