Hi Guys, I have a E46 Model 318Ci with a N42 Engine.
I am having a problem with engine rough idle beetween 1K and 2K revs .
I have tried disconnecting the valvetronic motor or ECU , and from the engine works perfectly , obviously valvetronic is disconnected.
On the plugging the valvetronic system again I will have the same problem again.
I have replaced the valvetronic servomotor but I did not solve the problem.
I really dont know what might be the solution to this prob at the moment.
Some have claimed that the valvetronic system might need calibration but no one assured that this would solve the problem .