So now I've:

-Swapped out OVP.
-Tested N3 (CIS Control Computer) for 12v & ground.
-Tested Air Intake Sensor.
-Tested wires from all major sensors back to N3 to make sure that there are no breaks in the harness.
-Knocked that drift pin in a couple of mm's.

Everything checked out perfectly. And the drift pin just knocked the AF Plate out of adjustment. For anyone's future reference: it only effects the rest state of the plate.

No idea where to go from here...


EDIT:

Almost forgot: I tested the ICV as well. All wires checked out as good (no breaks) but my FSM said to check for 12v btw pin #1 on the ICV connector & ground (ign. on). I was only getting a couple of volts there. Can anyone confirm that test for me?

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Currently:
1972 350SL Euro 4spd
1973 BMW R75/5
1981 BMW R80GS
1995 FZJ80 with OM606 Conversion In Progress