just pushing the clutch in, no throttle input at all?

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1992 850i 6 speed
1991 M3 S54B32 swap
2007 328iT/6 RWD sport wagon
1987 325E 330iZHP engine swap
2004 Vespa 200GT
1976 W115 240D getting a much bigger engine. 5.5L
1997 R129 SL600 5AT

I know you say you have cleaned the IACV. But it could be sticking. I struck this once.

Have you got a known good IACV you can swap ?


I can't remember that engine as it has been a while. But if I recall you can try unplugging various items to see if it influences the drive.

IE unplug the IACV and see if the symptoms disapear. It wont run great like this. Also if I remember you could do the same with the EHA... Not sure if this could be related though.