Thanks, but did you car run very bad with this wiring problem?

In my case I can just drive the car normally and can also give it some stick. It just feel 'sluggish' (?) when you want to drive away.

At the rolling road it turned out that through the whole rev range it had some serious fuel starvation.... (afr started at 16.6 (!) at 2400 RPM and at peak power (5200 rpm) it was still 13,6 (!!) )