I just cut the wire on the ECU and mine works fine.
I am running a 93 240sx, speed sensor still in and working, both the 4th and 5th gear sensors are unpluged, and the green wire on the ECU is cut and I just ran Memphis this past weekend at 6100 RPM in 5th down the straight with no issues.
I can find the wire number and actual color code if needed.
But glad you got your new ECU.
Carver