735i EML rough idle and missing road-speed signal in DME

[Volum]

Hello, I'm having issues with my E32.
It is a original 730i but I've changed the engine to 3.5. The problem is with rough idle. The engine has been rebuild by myself with new OEM gaskets. I ordered a used DME for 3.5 engine and coded with C32A variant code. (Before was 675E without cat). I cannot find any vac leaks. O2 sensor issue?
8Lgnsig.png

Another problem is with road-speed signal. DME doesn't show any speed while driving. Any suggestions?
C6vixzF.png

[shogun]

as for the road speed signal check the sensor, wiring and plug at the rear of the final drive http://www.bmwe34.net/E34main/Mainte...eed_sensor.htm
The signal goes from there to the cluster coding plug where it is converted, details here http://www.e38.org/e32/BMW_pdfs/INST_info.pdf

[Volum]

Speedometer works.