Excuse me because this is the hieght of laziness but I've lost my Haynes (if it would help).
BMW 318i of 1992 vintage. When I hit just over 3000 revs it is as if the rev limiter is partially kicking in. The engine vibrates and there is a loss of power. Drop the clutch and come off the accelerator so the revs can drop right down and it is back to normal for a while. Doesn't always happen but is getting more consistent
I am assuming that the ECU controls the rev limiter as it knows the revs and has control of injectors etc but a friend thinks there is some kind of centrifugal device in the distributor that does the rev limiting.
Any ideas?