The ECM in the '88 is like this unit found in the link you provided.

Engine Control Unit KE-Jetronic 3.1 117. (967, 968) (third one down).

The '88 ECM is shorter than the ones shown. I'd have to go thru my bookmarks, but I have found references that the ICV is controlled by the ECM. It does not have a separate controller like the V8 engines.

I can't recall off the top of my head the part number, but the second ECM I picked up was the same as the original. I have been very careful to match all OE part numbers to the spare parts I buy.

I've also found that the CSI operates up to 60 deg before it cuts out on this engine. So I'll pull it tomorrow and make sure it delivers fuel.

Thx for the input.