This is just a guess, but if you are experiencing both of these:
1. high idle, or surging high idle
2. No Cold Start Injector function, thus hard to cold start
in CIS-E Motronic, both of these functions' power wires are part of the same circuit, if I recall correctly it is a black/white wire - when I did my 16v swap and spliced the CIS-E Motronic harness into CIS, I made a mistake and wired the Black/White wire from the Motronic harness into ground - as that is what made sense following circuit diagrams that were in the Bentleys. I did not study A2Resource.com as much as I should and I ended up having the ISV stay wide open and the CSV not function at all. Check that wire, might help. It should be connected to switched power.