Idle Jerk. Please review MWB 13/18/23

Hello, I have uploaded diagrams to /viewtopic.php?p=138295 that compare the measurement data blocks 13/18/23 with a cold/warm engine and with the air conditioning system active/inactive. I hope that the diagrams will clearly show the cause of the defect (rough idle).

Thank you.

moby

Okay, from what I can see, cylinder 3 consistently has a slightly higher correction amount, but it's still within the tolerance range (+/- 2.8 mg, if I recall correctly). It's no longer possible to determine whether this is due to poor compression or, in part, to partially clogged injector nozzles.

MWB 18 and 23 are normal.

The PDE-Check-MWB should always be logged together with MWB1, so that you can see the current engine speed and (average) injection quantity. The fact that only 2 additional MWB (besides the initial one) are available is simply due to the system's limitations.